MC	<p>7157_42d3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/2, 50%	Correct	All, 100%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>41be_36ca</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	86	Incorrect	94	Incorrect	60	Incorrect	30	Incorrect	90	Correct
MC	<p>d54b_fdd5</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to show tailless?</p>	1/3, 33.3%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Correct	All, 100%	Incorrect	None, 0%	Incorrect
MC	<p>2b58_a793</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what fraction are expected to show curly wings?</p>	1/4, 25%	Incorrect	3/4, 75%	Incorrect	All, 100%	Incorrect	2/3, 66.7%	Correct	1/2, 50%	Incorrect
MC	<p>27cd_a7e9</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to be lethal?</p>	3/4, 75%	Incorrect	1/3, 33.3%	Incorrect	1/4, 25%	Correct	None, 0%	Incorrect	All, 100%	Incorrect
MC	<p>f3e7_7287</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to survive?</p>	All, 100%	Correct	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	None, 0%	Incorrect
MC	<p>2ae9_b493</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to survive?</p>	1/2, 50%	Incorrect	All, 100%	Correct	1/4, 25%	Incorrect	3/4, 75%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>4a36_4b5c</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/3, 33.3%	Incorrect	1/4, 25%	Incorrect	2/3, 66.7%	Correct	All, 100%	Incorrect	3/4, 75%	Incorrect
MC	<p>3161_7151</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 120 conceptions occur, how many are expected to be lethal?</p>	120	Incorrect	30	Incorrect	4	Incorrect	90	Incorrect	0	Correct
MC	<p>7157_37de</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/2, 50%	Correct	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>2cd4_29c7</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show yellow coat?</p>	All, 100%	Incorrect	3/4, 75%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Correct	1/2, 50%	Incorrect
MC	<p>ede0_260b</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of curly wings to normal phenotype?</p>	3 to 2	Incorrect	3 to 1	Incorrect	2 to 1	Correct	1 to 2	Incorrect	1 to 1	Incorrect
MC	<p>3f0f_7ba5</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/4, 25%	Correct	All, 100%	Incorrect	1/3, 33.3%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Incorrect
MC	<p>4a69_6d79</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to show yellow coat?</p>	30	Incorrect	56	Incorrect	120	Incorrect	60	Correct	90	Incorrect
MC	<p>3ee8_949d</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>Among surviving offspring, what is the ratio of normal phenotype to yellow coat?</p>	1 to 1	Correct	2 to 1	Incorrect	3 to 1	Incorrect	1 to 2	Incorrect	3 to 2	Incorrect
MC	<p>4a36_f9b0</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/2, 50%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Correct	1/4, 25%	Incorrect	3/4, 75%	Incorrect
MC	<p>907c_8361</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>If 160 conceptions occur, how many are expected to have the normal phenotype?</p>	40	Correct	120	Incorrect	160	Incorrect	36	Incorrect	44	Incorrect
MC	<p>4e1d_60f8</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	30	Incorrect	120	Incorrect	60	Correct	64	Incorrect	90	Incorrect
MC	<p>7cf7_0ccf</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what is the ratio of yellow coat to normal phenotype?</p>	3 to 1	Incorrect	1 to 1	Incorrect	1 to 2	Incorrect	2 to 1	Correct	3 to 2	Incorrect
MC	<p>d693_9168</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	3 to 1	Incorrect	3 to 2	Incorrect	2 to 1	Incorrect	1 to 2	Incorrect	1 to 1	Correct
MC	<p>60a3_cbd3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	1 to 1	Incorrect	3 to 2	Incorrect	2 to 1	Correct	3 to 1	Incorrect	1 to 2	Incorrect
MC	<p>0b74_c14c</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>If 160 conceptions occur, how many are expected to show dwarf legs?</p>	84	Incorrect	160	Incorrect	40	Incorrect	80	Correct	76	Incorrect
MC	<p>60a3_5982</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	3 to 1	Incorrect	1 to 2	Incorrect	1 to 1	Incorrect	2 to 1	Correct	3 to 2	Incorrect
MC	<p>f823_c905</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>What fraction of all conceptions are expected to show curly wings?</p>	2/3, 66.7%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect	None, 0%	Incorrect
MC	<p>27cd_6a99</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to be lethal?</p>	1/4, 25%	Correct	All, 100%	Incorrect	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	None, 0%	Incorrect
MC	<p>5b06_fec0</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>If 160 conceptions occur, how many are expected to have the normal phenotype?</p>	120	Incorrect	80	Incorrect	36	Incorrect	160	Incorrect	40	Correct
MC	<p>6385_26f9</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to be lethal?</p>	All, 100%	Incorrect	None, 0%	Correct	1/2, 50%	Incorrect	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>461d_a77e</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to show dwarf legs?</p>	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	None, 0%	Incorrect
MC	<p>a867_8989</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of yellow coat to normal phenotype?</p>	3 to 2	Incorrect	1 to 2	Incorrect	3 to 1	Incorrect	1 to 1	Correct	2 to 1	Incorrect
MC	<p>a2a2_6829</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	3 to 2	Incorrect	1 to 2	Incorrect	1 to 1	Correct	3 to 1	Incorrect	2 to 1	Incorrect
MC	<p>e245_9c40</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to show curly wings?</p>	60	Correct	30	Incorrect	64	Incorrect	56	Incorrect	120	Incorrect
MC	<p>03cd_1765</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	1/3, 33.3%	Correct	3/4, 75%	Incorrect	1/4, 25%	Incorrect	All, 100%	Incorrect	None, 0%	Incorrect
MC	<p>f484_7001</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	120	Correct	80	Incorrect	40	Incorrect	124	Incorrect	160	Incorrect
MC	<p>b799_3c67</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 160 conceptions occur, how many are expected to have the normal phenotype?</p>	76	Incorrect	84	Incorrect	40	Incorrect	80	Correct	120	Incorrect
MC	<p>7dfd_f7b4</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to show curly wings?</p>	2/3, 66.7%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	1/4, 25%	Incorrect	None, 0%	Incorrect
MC	<p>1293_0738</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show curly wings?</p>	1/2, 50%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Correct	1/4, 25%	Incorrect
MC	<p>c698_f99a</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	3 to 2	Incorrect	1 to 2	Correct	2 to 1	Incorrect	1 to 1	Incorrect	3 to 1	Incorrect
MC	<p>cd09_1f3a</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 80 conceptions occur, how many are expected to be lethal?</p>	60	Incorrect	80	Incorrect	20	Incorrect	4	Incorrect	0	Correct
MC	<p>821b_9168</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	3 to 1	Incorrect	3 to 2	Incorrect	2 to 1	Incorrect	1 to 2	Correct	1 to 1	Incorrect
MC	<p>2d80_eebe</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	116	Incorrect	90	Incorrect	120	Correct	60	Incorrect	30	Incorrect
MC	<p>9109_4158</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>What fraction of all conceptions are expected to be lethal?</p>	3/4, 75%	Incorrect	None, 0%	Correct	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>8409_c744</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to survive?</p>	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Correct	All, 100%	Incorrect
MC	<p>ae65_a36c</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	26	Incorrect	90	Incorrect	60	Incorrect	34	Incorrect	30	Correct
MC	<p>1e05_a30e</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to be lethal?</p>	120	Incorrect	80	Incorrect	40	Incorrect	0	Correct	160	Incorrect
MC	<p>53c4_486f</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>If 80 conceptions occur, how many are expected to be lethal?</p>	24	Incorrect	16	Incorrect	20	Correct	80	Incorrect	40	Incorrect
MC	<p>743c_0769</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	2/3, 66.7%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect	3/4, 75%	Incorrect	All, 100%	Incorrect
MC	<p>60a3_0550</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	3 to 1	Incorrect	2 to 1	Correct	1 to 2	Incorrect	3 to 2	Incorrect	1 to 1	Incorrect
MC	<p>97b5_ce2c</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>If 120 conceptions occur, how many are expected to show curly wings?</p>	56	Incorrect	60	Correct	120	Incorrect	90	Incorrect	30	Incorrect
MC	<p>d23f_2300</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>What fraction of all conceptions are expected to survive?</p>	2/3, 66.7%	Incorrect	3/4, 75%	Correct	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	All, 100%	Incorrect
MC	<p>189d_9448</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	60	Correct	56	Incorrect	30	Incorrect	64	Incorrect	120	Incorrect
MC	<p>9506_d876</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/4, 25%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Correct
MC	<p>7eb6_e142</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>If 40 conceptions occur, how many are expected to survive?</p>	40	Correct	36	Incorrect	44	Incorrect	30	Incorrect	20	Incorrect
MC	<p>0d6e_c716</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to show tailless?</p>	None, 0%	Incorrect	1/4, 25%	Incorrect	All, 100%	Incorrect	1/2, 50%	Correct	1/3, 33.3%	Incorrect
MC	<p>0738_445e</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to be lethal?</p>	None, 0%	Incorrect	1/4, 25%	Correct	All, 100%	Incorrect	3/4, 75%	Incorrect	1/2, 50%	Incorrect
MC	<p>c7cd_8c4c</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to show yellow coat?</p>	1/4, 25%	Incorrect	All, 100%	Incorrect	1/2, 50%	Correct	None, 0%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>b407_d866</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	All, 100%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect
MC	<p>821b_de1d</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	3 to 2	Incorrect	3 to 1	Incorrect	2 to 1	Incorrect	1 to 1	Incorrect	1 to 2	Correct
MC	<p>27cd_ec70</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to be lethal?</p>	1/4, 25%	Correct	1/3, 33.3%	Incorrect	None, 0%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Incorrect
MC	<p>8a16_43d0</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to be lethal?</p>	1/2, 50%	Incorrect	None, 0%	Correct	2/3, 66.7%	Incorrect	All, 100%	Incorrect	3/4, 75%	Incorrect
MC	<p>893a_7174</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>What fraction of all conceptions are expected to survive?</p>	None, 0%	Incorrect	3/4, 75%	Incorrect	1/3, 33.3%	Incorrect	All, 100%	Correct	1/4, 25%	Incorrect
MC	<p>9b71_bdd6</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	120	Correct	116	Incorrect	30	Incorrect	60	Incorrect	124	Incorrect
MC	<p>24b2_8f50</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>If 80 conceptions occur, how many are expected to be lethal?</p>	80	Incorrect	40	Incorrect	20	Correct	60	Incorrect	24	Incorrect
MC	<p>dd1c_2f39</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	None, 0%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect	All, 100%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>20fc_c9d2</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what fraction are expected to show tailless?</p>	3/4, 75%	Incorrect	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct
MC	<p>d4b5_5af9</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect	1/4, 25%	Correct	1/2, 50%	Incorrect	None, 0%	Incorrect
MC	<p>7cf7_47db</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what is the ratio of yellow coat to normal phenotype?</p>	1 to 1	Incorrect	2 to 1	Correct	3 to 2	Incorrect	1 to 2	Incorrect	3 to 1	Incorrect
MC	<p>03d2_44d2</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to be lethal?</p>	120	Incorrect	26	Incorrect	34	Incorrect	30	Correct	60	Incorrect
MC	<p>31e9_22b0</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	64	Incorrect	120	Incorrect	60	Correct	90	Incorrect	56	Incorrect
MC	<p>83fa_1787</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	None, 0%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>b53d_05bb</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>What fraction of all conceptions are expected to survive?</p>	None, 0%	Incorrect	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect	3/4, 75%	Correct	All, 100%	Incorrect
MC	<p>562a_4996</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 40 conceptions occur, how many are expected to be lethal?</p>	30	Incorrect	0	Correct	4	Incorrect	40	Incorrect	20	Incorrect
MC	<p>2b4d_8afc</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to show tailless?</p>	160	Incorrect	120	Incorrect	80	Correct	84	Incorrect	76	Incorrect
MC	<p>da64_f99a</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	3 to 2	Incorrect	1 to 2	Incorrect	2 to 1	Incorrect	1 to 1	Correct	3 to 1	Incorrect
MC	<p>595f_3c9a</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	80	Incorrect	40	Incorrect	160	Correct	120	Incorrect	156	Incorrect
MC	<p>2a89_9c2b</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	3 to 2	Incorrect	3 to 1	Incorrect	1 to 2	Incorrect	2 to 1	Incorrect	1 to 1	Correct
MC	<p>2a89_252a</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	1 to 2	Incorrect	1 to 1	Correct	2 to 1	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect
MC	<p>d17a_acd5</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>What fraction of all conceptions are expected to be lethal?</p>	None, 0%	Correct	1/3, 33.3%	Incorrect	3/4, 75%	Incorrect	2/3, 66.7%	Incorrect	1/2, 50%	Incorrect
MC	<p>743c_981f</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	1/2, 50%	Correct	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect	All, 100%	Incorrect	1/4, 25%	Incorrect
MC	<p>ea68_b3a4</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	2 to 1	Incorrect	1 to 2	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect	1 to 1	Correct
MC	<p>c698_84a6</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	1 to 2	Correct	3 to 1	Incorrect	2 to 1	Incorrect	3 to 2	Incorrect	1 to 1	Incorrect
MC	<p>d4b5_b677</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	All, 100%	Incorrect	None, 0%	Incorrect	1/4, 25%	Correct	3/4, 75%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>d66f_b125</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to survive?</p>	2/3, 66.7%	Incorrect	All, 100%	Correct	None, 0%	Incorrect	1/2, 50%	Incorrect	1/4, 25%	Incorrect
MC	<p>329b_00aa</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to show yellow coat?</p>	1/4, 25%	Incorrect	1/2, 50%	Correct	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect	3/4, 75%	Incorrect
MC	<p>e7ff_6d7f</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/2, 50%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Incorrect	1/4, 25%	Correct	1/3, 33.3%	Incorrect
MC	<p>4e1d_6f6d</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	64	Incorrect	56	Incorrect	30	Incorrect	90	Incorrect	60	Correct
MC	<p>743c_1210</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	None, 0%	Incorrect	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect	1/2, 50%	Correct	All, 100%	Incorrect
MC	<p>e165_f56a</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>What fraction of all conceptions are expected to be lethal?</p>	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	None, 0%	Incorrect	1/4, 25%	Correct	All, 100%	Incorrect
MC	<p>ebf5_963c</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	120	Incorrect	60	Correct	56	Incorrect	30	Incorrect	90	Incorrect
MC	<p>3d1d_6fe6</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>If 80 conceptions occur, how many are expected to have the normal phenotype?</p>	16	Incorrect	80	Incorrect	60	Incorrect	24	Incorrect	20	Correct
MC	<p>12b3_fabb</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	1 to 2	Correct	3 to 2	Incorrect	2 to 1	Incorrect	3 to 1	Incorrect	1 to 1	Incorrect
MC	<p>d3e7_f9cc</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	30	Incorrect	56	Incorrect	90	Incorrect	120	Incorrect	60	Correct
MC	<p>595f_301e</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	40	Incorrect	80	Incorrect	156	Incorrect	120	Incorrect	160	Correct
MC	<p>b1d9_8333</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>If 80 conceptions occur, how many are expected to survive?</p>	76	Incorrect	40	Incorrect	80	Correct	84	Incorrect	60	Incorrect
MC	<p>d413_b1d7</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	60	Correct	56	Incorrect	90	Incorrect	30	Incorrect	120	Incorrect
MC	<p>9506_f57e</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	1/4, 25%	Incorrect	2/3, 66.7%	Correct	None, 0%	Incorrect
MC	<p>f484_116b</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	40	Incorrect	80	Incorrect	116	Incorrect	120	Correct	124	Incorrect
MC	<p>60a3_bc43</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	1 to 2	Incorrect	2 to 1	Correct	1 to 1	Incorrect	3 to 1	Incorrect	3 to 2	Incorrect
MC	<p>0669_f99a</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of normal phenotype to yellow coat?</p>	3 to 2	Incorrect	1 to 2	Incorrect	2 to 1	Incorrect	1 to 1	Correct	3 to 1	Incorrect
MC	<p>1ea5_62e1</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>If 40 conceptions occur, how many are expected to have the normal phenotype?</p>	20	Incorrect	30	Incorrect	10	Correct	40	Incorrect	14	Incorrect
MC	<p>d66f_3482</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to survive?</p>	All, 100%	Correct	None, 0%	Incorrect	3/4, 75%	Incorrect	1/4, 25%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>ede0_7eaa</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of curly wings to normal phenotype?</p>	1 to 2	Incorrect	1 to 1	Incorrect	3 to 2	Incorrect	2 to 1	Correct	3 to 1	Incorrect
MC	<p>0dfa_260b</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	3 to 2	Incorrect	3 to 1	Incorrect	2 to 1	Correct	1 to 2	Incorrect	1 to 1	Incorrect
MC	<p>dd1c_fdd5</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/3, 33.3%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Correct	All, 100%	Incorrect	None, 0%	Incorrect
MC	<p>2e55_b961</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect	1/4, 25%	Correct	All, 100%	Incorrect
MC	<p>5bb8_2a9e</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 40 conceptions occur, how many are expected to have the normal phenotype?</p>	20	Correct	24	Incorrect	16	Incorrect	10	Incorrect	40	Incorrect
MC	<p>d54b_f4cd</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to show tailless?</p>	3/4, 75%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>4217_8e1c</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	All, 100%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect
MC	<p>83fa_cd3b</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	1/4, 25%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>f554_b879</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 40 conceptions occur, how many are expected to show tailless?</p>	20	Correct	24	Incorrect	30	Incorrect	40	Incorrect	16	Incorrect
MC	<p>9d37_3a14</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 80 conceptions occur, how many are expected to show tailless?</p>	40	Correct	20	Incorrect	44	Incorrect	60	Incorrect	36	Incorrect
MC	<p>401a_0e68</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	1 to 1	Correct	3 to 1	Incorrect	1 to 2	Incorrect	2 to 1	Incorrect	3 to 2	Incorrect
MC	<p>da64_f388</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	2 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Incorrect	1 to 1	Correct	3 to 1	Incorrect
MC	<p>ef42_5de3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	1 to 2	Correct	2 to 1	Incorrect	3 to 1	Incorrect	1 to 1	Incorrect	3 to 2	Incorrect
MC	<p>54ed_3c27</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to show dwarf legs?</p>	76	Incorrect	80	Correct	160	Incorrect	40	Incorrect	120	Incorrect
MC	<p>068e_26f9</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	All, 100%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>55c9_2148</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of curly wings to normal phenotype?</p>	2 to 1	Correct	3 to 2	Incorrect	1 to 1	Incorrect	3 to 1	Incorrect	1 to 2	Incorrect
MC	<p>e7ff_03d3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/4, 25%	Correct	None, 0%	Incorrect	2/3, 66.7%	Incorrect	All, 100%	Incorrect	1/2, 50%	Incorrect
MC	<p>ef42_3243</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	1 to 1	Incorrect	3 to 2	Incorrect	2 to 1	Incorrect	1 to 2	Correct	3 to 1	Incorrect
MC	<p>dd1c_e5f8</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/3, 33.3%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	None, 0%	Incorrect	1/4, 25%	Incorrect
MC	<p>22bf_7e69</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	1 to 2	Incorrect	1 to 1	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect	2 to 1	Correct
MC	<p>f554_1b6e</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 40 conceptions occur, how many are expected to show tailless?</p>	16	Incorrect	30	Incorrect	24	Incorrect	20	Correct	40	Incorrect
MC	<p>ba39_820f</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to be lethal?</p>	All, 100%	Incorrect	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	1/4, 25%	Correct	3/4, 75%	Incorrect
MC	<p>bdfe_9480</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to survive?</p>	3/4, 75%	Correct	2/3, 66.7%	Incorrect	1/4, 25%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>8173_e6b2</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 80 conceptions occur, how many are expected to show tailless?</p>	36	Incorrect	40	Correct	60	Incorrect	80	Incorrect	20	Incorrect
MC	<p>2e55_b879</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/2, 50%	Incorrect	3/4, 75%	Incorrect	All, 100%	Incorrect	None, 0%	Incorrect	1/4, 25%	Correct
MC	<p>4121_52cd</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to survive?</p>	3/4, 75%	Incorrect	1/3, 33.3%	Incorrect	1/2, 50%	Incorrect	All, 100%	Correct	1/4, 25%	Incorrect
MC	<p>e8df_47db</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of normal phenotype to yellow coat?</p>	1 to 1	Incorrect	2 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Correct	3 to 1	Incorrect
MC	<p>f176_4250</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	1 to 1	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect	1 to 2	Incorrect	2 to 1	Correct
MC	<p>d3e7_c827</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	90	Incorrect	60	Correct	30	Incorrect	120	Incorrect	64	Incorrect
MC	<p>b16d_169a</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>What fraction of all conceptions are expected to survive?</p>	All, 100%	Correct	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Incorrect
MC	<p>6c03_96a3</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what fraction are expected to show yellow coat?</p>	3/4, 75%	Incorrect	1/4, 25%	Incorrect	2/3, 66.7%	Correct	None, 0%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>4217_8944</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/3, 33.3%	Incorrect	1/2, 50%	Correct	None, 0%	Incorrect	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect
MC	<p>a3c6_5722</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect	1/3, 33.3%	Correct	None, 0%	Incorrect	All, 100%	Incorrect
MC	<p>6c03_b7af</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what fraction are expected to show yellow coat?</p>	None, 0%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Incorrect	2/3, 66.7%	Correct	1/3, 33.3%	Incorrect
MC	<p>8716_bdab</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	90	Correct	30	Incorrect	120	Incorrect	60	Incorrect	94	Incorrect
MC	<p>2ae9_48f5</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to survive?</p>	3/4, 75%	Incorrect	1/3, 33.3%	Incorrect	All, 100%	Correct	1/2, 50%	Incorrect	1/4, 25%	Incorrect
MC	<p>e165_0003</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>What fraction of all conceptions are expected to be lethal?</p>	All, 100%	Incorrect	1/3, 33.3%	Incorrect	None, 0%	Incorrect	1/2, 50%	Incorrect	1/4, 25%	Correct
MC	<p>c17a_171d</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	1 to 1	Incorrect	3 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Correct	2 to 1	Incorrect
MC	<p>6227_f5d5</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>If 160 conceptions occur, how many are expected to be lethal?</p>	120	Incorrect	40	Incorrect	160	Incorrect	4	Incorrect	0	Correct
MC	<p>22bf_4455</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	1 to 2	Incorrect	2 to 1	Correct	1 to 1	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect
MC	<p>22bf_8c13</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of tailless to normal phenotype?</p>	2 to 1	Correct	3 to 1	Incorrect	1 to 2	Incorrect	3 to 2	Incorrect	1 to 1	Incorrect
MC	<p>211f_14ab</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 160 conceptions occur, how many are expected to be lethal?</p>	4	Incorrect	0	Correct	120	Incorrect	40	Incorrect	80	Incorrect
MC	<p>a991_1140</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	80	Incorrect	116	Incorrect	160	Incorrect	124	Incorrect	120	Correct
MC	<p>7754_e49d</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x yy.</p><p>What fraction of all conceptions are expected to be lethal?</p>	All, 100%	Incorrect	3/4, 75%	Incorrect	None, 0%	Correct	1/2, 50%	Incorrect	1/4, 25%	Incorrect
MC	<p>d9a0_703c</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	60	Correct	64	Incorrect	30	Incorrect	56	Incorrect	90	Incorrect
MC	<p>d23f_8de6</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>What fraction of all conceptions are expected to survive?</p>	1/4, 25%	Incorrect	All, 100%	Incorrect	1/2, 50%	Incorrect	2/3, 66.7%	Incorrect	3/4, 75%	Correct
MC	<p>8017_8fa5</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to show yellow coat?</p>	80	Correct	76	Incorrect	160	Incorrect	120	Incorrect	84	Incorrect
MC	<p>d2f9_3d64</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what is the ratio of normal phenotype to yellow coat?</p>	3 to 2	Incorrect	1 to 1	Incorrect	1 to 2	Correct	3 to 1	Incorrect	2 to 1	Incorrect
MC	<p>0bdc_78c8</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/4, 25%	Incorrect	All, 100%	Incorrect	3/4, 75%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct
MC	<p>164f_51d9</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 80 conceptions occur, how many are expected to show curly wings?</p>	60	Incorrect	36	Incorrect	44	Incorrect	80	Incorrect	40	Correct
MC	<p>41be_6f33</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	94	Incorrect	86	Incorrect	30	Incorrect	90	Correct	120	Incorrect
MC	<p>6362_7cc3</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to survive?</p>	None, 0%	Incorrect	2/3, 66.7%	Incorrect	1/3, 33.3%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Correct
MC	<p>9334_f760</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>What fraction of all conceptions are expected to show dwarf legs?</p>	3/4, 75%	Incorrect	2/3, 66.7%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect
MC	<p>ede0_171d</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of curly wings to normal phenotype?</p>	1 to 1	Incorrect	3 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Incorrect	2 to 1	Correct
MC	<p>1633_19fc</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show tailless?</p>	All, 100%	Incorrect	1/2, 50%	Incorrect	1/4, 25%	Incorrect	2/3, 66.7%	Correct	None, 0%	Incorrect
MC	<p>e69f_bc43</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	1 to 2	Incorrect	2 to 1	Incorrect	1 to 1	Correct	3 to 1	Incorrect	3 to 2	Incorrect
MC	<p>a4e6_2a4d</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to show curly wings?</p>	2/3, 66.7%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>401a_e4f0</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	3 to 1	Incorrect	2 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Incorrect	1 to 1	Correct
MC	<p>f242_3f70</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 80 conceptions occur, how many are expected to show tailless?</p>	20	Incorrect	60	Incorrect	36	Incorrect	40	Correct	80	Incorrect
MC	<p>0dfa_6db3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of dwarf legs to normal phenotype?</p>	2 to 1	Correct	3 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Incorrect	1 to 1	Incorrect
MC	<p>4e1d_7801</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to show tailless?</p>	60	Correct	120	Incorrect	64	Incorrect	56	Incorrect	30	Incorrect
MC	<p>26fd_e9a3</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	116	Incorrect	124	Incorrect	80	Incorrect	40	Incorrect	120	Correct
MC	<p>2cff_0fd2</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what fraction are expected to have the normal phenotype?</p>	1/3, 33.3%	Correct	1/4, 25%	Incorrect	1/2, 50%	Incorrect	All, 100%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>b0cc_dd06</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	160	Correct	80	Incorrect	156	Incorrect	40	Incorrect	120	Incorrect
MC	<p>b98a_9441</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>If 160 conceptions occur, how many are expected to have the normal phenotype?</p>	160	Incorrect	44	Incorrect	40	Correct	36	Incorrect	80	Incorrect
MC	<p>821b_35af</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	2 to 1	Incorrect	1 to 1	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect	1 to 2	Correct
MC	<p>20fc_b296</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x tt.</p><p>Among surviving offspring, what fraction are expected to show tailless?</p>	3/4, 75%	Incorrect	None, 0%	Incorrect	1/2, 50%	Correct	All, 100%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>bed3_e77f</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>If 80 conceptions occur, how many are expected to show dwarf legs?</p>	20	Incorrect	36	Incorrect	40	Correct	60	Incorrect	80	Incorrect
MC	<p>b0e1_8a6b</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	1 to 2	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect	2 to 1	Incorrect	1 to 1	Correct
MC	<p>2a89_f80e</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	3 to 1	Incorrect	3 to 2	Incorrect	1 to 1	Correct	2 to 1	Incorrect	1 to 2	Incorrect
MC	<p>9d7e_ab98</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/4, 25%	Correct	None, 0%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Incorrect	3/4, 75%	Incorrect
MC	<p>c698_b448</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what is the ratio of normal phenotype to curly wings?</p>	1 to 1	Incorrect	3 to 1	Incorrect	2 to 1	Incorrect	1 to 2	Correct	3 to 2	Incorrect
MC	<p>98ba_b8cb</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	164	Incorrect	80	Incorrect	160	Correct	120	Incorrect	156	Incorrect
MC	<p>6dee_f1c3</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>If 40 conceptions occur, how many are expected to be lethal?</p>	0	Correct	40	Incorrect	4	Incorrect	30	Incorrect	10	Incorrect
MC	<p>cd09_7fa9</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 80 conceptions occur, how many are expected to be lethal?</p>	60	Incorrect	80	Incorrect	0	Correct	4	Incorrect	20	Incorrect
MC	<p>da64_ece9</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what is the ratio of normal phenotype to tailless?</p>	3 to 1	Incorrect	1 to 1	Correct	3 to 2	Incorrect	2 to 1	Incorrect	1 to 2	Incorrect
MC	<p>c7cd_5045</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to show yellow coat?</p>	2/3, 66.7%	Incorrect	All, 100%	Incorrect	3/4, 75%	Incorrect	1/2, 50%	Correct	1/3, 33.3%	Incorrect
MC	<p>8a16_8441</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>What fraction of all conceptions are expected to be lethal?</p>	1/3, 33.3%	Incorrect	3/4, 75%	Incorrect	1/2, 50%	Incorrect	None, 0%	Correct	1/4, 25%	Incorrect
MC	<p>2e4b_b8cb</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 160 conceptions occur, how many are expected to survive?</p>	164	Incorrect	80	Incorrect	160	Correct	120	Incorrect	156	Incorrect
MC	<p>7cf7_a67b</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). The parental cross is Yy x Yy.</p><p>Among surviving offspring, what is the ratio of yellow coat to normal phenotype?</p>	1 to 1	Incorrect	2 to 1	Correct	1 to 2	Incorrect	3 to 2	Incorrect	3 to 1	Incorrect
MC	<p>2b58_2398</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x Cc.</p><p>Among surviving offspring, what fraction are expected to show curly wings?</p>	None, 0%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Correct
MC	<p>b0e1_e4f0</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>Among surviving offspring, what is the ratio of normal phenotype to dwarf legs?</p>	3 to 1	Incorrect	2 to 1	Incorrect	3 to 2	Incorrect	1 to 2	Incorrect	1 to 1	Correct
MC	<p>05ab_659f</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to survive?</p>	1/3, 33.3%	Incorrect	3/4, 75%	Correct	2/3, 66.7%	Incorrect	None, 0%	Incorrect	1/4, 25%	Incorrect
MC	<p>b709_3490</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). The parental cross is Cc x cc.</p><p>If 120 conceptions occur, how many are expected to survive?</p>	124	Incorrect	120	Correct	116	Incorrect	90	Incorrect	30	Incorrect
MC	<p>46d1_8989</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what is the ratio of yellow coat to normal phenotype?</p>	3 to 2	Incorrect	1 to 2	Incorrect	3 to 1	Incorrect	1 to 1	Incorrect	2 to 1	Correct
MC	<p>3f0f_46c8</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	1/2, 50%	Incorrect	2/3, 66.7%	Incorrect	All, 100%	Incorrect	1/3, 33.3%	Incorrect	1/4, 25%	Correct
MC	<p>f0ab_ffad</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). Two heterozygous individuals are crossed.</p><p>If 40 conceptions occur, how many are expected to be lethal?</p>	10	Correct	30	Incorrect	20	Incorrect	6	Incorrect	40	Incorrect
MC	<p>27cd_9306</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to be lethal?</p>	All, 100%	Incorrect	1/4, 25%	Correct	1/3, 33.3%	Incorrect	None, 0%	Incorrect	2/3, 66.7%	Incorrect
MC	<p>26fe_ceef</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). The parental cross is Tt x Tt.</p><p>If 160 conceptions occur, how many are expected to show tailless?</p>	80	Correct	40	Incorrect	120	Incorrect	76	Incorrect	160	Incorrect
MC	<p>7c4b_be6f</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 80 conceptions occur, how many are expected to have the normal phenotype?</p>	80	Incorrect	36	Incorrect	60	Incorrect	44	Incorrect	40	Correct
MC	<p>bdfe_d438</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to survive?</p>	3/4, 75%	Correct	2/3, 66.7%	Incorrect	All, 100%	Incorrect	1/2, 50%	Incorrect	1/3, 33.3%	Incorrect
MC	<p>9334_9e0b</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x dd.</p><p>What fraction of all conceptions are expected to show dwarf legs?</p>	3/4, 75%	Incorrect	None, 0%	Incorrect	1/3, 33.3%	Incorrect	1/2, 50%	Correct	1/4, 25%	Incorrect
MC	<p>ae65_dbc9</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>If 120 conceptions occur, how many are expected to have the normal phenotype?</p>	60	Incorrect	26	Incorrect	34	Incorrect	120	Incorrect	30	Correct
MC	<p>8409_fed5</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to survive?</p>	2/3, 66.7%	Incorrect	All, 100%	Incorrect	1/2, 50%	Incorrect	3/4, 75%	Correct	None, 0%	Incorrect
MC	<p>068e_6c20</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>Among surviving offspring, what fraction are expected to show dwarf legs?</p>	All, 100%	Incorrect	2/3, 66.7%	Incorrect	1/2, 50%	Correct	3/4, 75%	Incorrect	1/4, 25%	Incorrect
MC	<p>2e55_574e</p> <p>In fruit flies, allele C causes curly wings in heterozygotes (Cc) but is lethal in homozygotes (CC). Two heterozygous individuals are crossed.</p><p>What fraction of all conceptions are expected to have the normal phenotype?</p>	2/3, 66.7%	Incorrect	1/4, 25%	Correct	1/2, 50%	Incorrect	None, 0%	Incorrect	3/4, 75%	Incorrect
MC	<p>2cd4_8120</p> <p>In mice, allele Y causes yellow coat in heterozygotes (Yy) but is lethal in homozygotes (YY). Two heterozygous individuals are crossed.</p><p>Among surviving offspring, what fraction are expected to show yellow coat?</p>	All, 100%	Incorrect	1/3, 33.3%	Incorrect	2/3, 66.7%	Correct	None, 0%	Incorrect	1/2, 50%	Incorrect
MC	<p>76ce_8ebe</p> <p>In cattle, allele D causes dwarf legs in heterozygotes (Dd) but is lethal in homozygotes (DD). The parental cross is Dd x Dd.</p><p>What fraction of all conceptions are expected to show dwarf legs?</p>	All, 100%	Incorrect	1/4, 25%	Incorrect	1/2, 50%	Correct	1/3, 33.3%	Incorrect	None, 0%	Incorrect
MC	<p>a07f_4ed9</p> <p>In cats, allele T causes tailless in heterozygotes (Tt) but is lethal in homozygotes (TT). A heterozygous individual is crossed with a normal homozygous recessive individual.</p><p>If 120 conceptions occur, how many are expected to be lethal?</p>	90	Incorrect	4	Incorrect	120	Incorrect	60	Incorrect	0	Correct