4: Mendelian Genetics
Mendel's principles, Punnett squares, genotype/phenotype ratios, and autosomal pedigree analysis.
LibreTexts reference: Mendelian Genetics
Matching Mendelian Cross Generations to Descriptions
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Match each of the following Mendelian crosses and generational stages with their corresponding descriptions.
Note: Each choice will be used exactly once.
| Your Choice | Prompt | |
|---|---|---|
| 1. P generation | ||
| 2. F1 generation | ||
| 3. test cross | ||
| 4. hybrid cross | ||
| 5. F2 generation |
Drag one of the choices below:
- A. a genetic cross in which a dominant phenotype is paired with a homozygous recessive genotype
- B. the subsequent generation derived from interbreeding or self-breeding of F1 generation hybrids
- C. the first generation in a cross; the offspring of the parental generation
- D. a cross involving two true-breeding organisms with distinct traits
- E. this generation consists of two homozygous individuals with different phenotype for a hybrid cross
Matching Mendel's Foundational Principles to Descriptions
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Match each of the following Mendel's Foundational Principles of Genetics with their corresponding descriptions.
Note: Each choice will be used exactly once.
| Your Choice | Prompt | |
|---|---|---|
| 1. Law of Segregation | ||
| 2. Principle of Dominance | ||
| 3. Law of Independent Assortment | ||
| 4. Principle of Paired Factors |
Drag one of the choices below:
- A. Each pair of traits is passed down without any impact on the passage of other pairs during the creation of gametes.
- B. Each organism has two alleles that make up the characters for a given trait.
- C. In cases where contrasting alleles are present, the dominant allele determines the phenotype.
- D. Two alleles for a character are randomly distributed into different gametes.
Matching Mendelian Genetics Terms to Definitions
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Match each of the following Mendelian genetics terms with their corresponding definitions.
Note: Each choice will be used exactly once.
| Your Choice | Prompt | |
|---|---|---|
| 1. phenotype | ||
| 2. alleles | ||
| 3. heterozygous | ||
| 4. trait | ||
| 5. gamete |
Drag one of the choices below:
- A. the observable traits of an individual, such as height and eye color
- B. a haploid cell (e.g., sperm or egg) that fuses with another haploid cell during fertilization in organisms
- C. one version among multiple DNA sequences at a locus
- D. presence of two different gene copies
- E. each variant for a character, such as round or wrinkled seeds in flowers
Matching Monohybrid Cross Genotypes to Phenotypes
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Match each of the following parental genotypes in monohybrid crosses with their corresponding descriptions of the progeny.
Note: Each choice will be used exactly once.
| Your Choice | Prompt | |
|---|---|---|
| 1. AA×Aa | ||
| 2. AA×AA | ||
| 3. Aa×Aa | ||
| 4. aa×aa | ||
| 5. Aa×aa | ||
| 6. AA×aa |
Drag one of the choices below:
- A. All offspring have the dominant phenotype and are heterozygous
- B. Produces only the recessive phenotype in progeny
- C. All offspring have the same dominant genotype and phenotype
- D. 25% of the offspring are homozygous dominant
- E. 50% of the offspring are homozygous recessive
- F. Yields offspring with 50% homozygous dominant and 50% heterozygous genotypes
Identifying Mendelian Cross Generations
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Which one of the following Mendelian crosses and generational stages correspond to the description 'this generation includes two true-breeding individuals with different traits in a hybrid cross'.
Identifying Mendel's Foundational Principles
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Which one of the following Mendel's Foundational Principles of Genetics correspond to the description 'Inheritance patterns for one trait do NOT interfere with those of another trait.'.
Identifying Mendelian Genetics Terms
Click to show Identifying Mendelian Genetics Terms example problem
Which one of the following Mendelian genetics terms correspond to the definition 'possession of a pair of identical alleles'.
Identifying Monohybrid Cross Genotype Outcomes
Click to show Identifying Monohybrid Cross Genotype Outcomes example problem
Which one of the following parental genotypes in monohybrid crosses correspond to the description of the progeny 'All offspring have the same dominant genotype and phenotype'.