4: Mendelian Genetics
Mendel’s principles, Punnett squares, genotype/phenotype ratios, and autosomal pedigree analysis.
LibreTexts reference: Mendelian Genetics
Mendelian Crosses and Generational Stages Identification
Click to show Mendelian Crosses and Generational Stages Identification example problem
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. backcross | ||
| 2. F2 generation | ||
| 3. F1 generation | ||
| 4. reciprocal cross | ||
| 5. hybrid cross |
Drag one of the choices below:
- A. hybrid offspring of the parental generation
- B. the offspring resulting from either self-fertilization or cross-fertilization of F1 generation individuals
- C. a type of cross where F1 generation hybrids are crossed with one of the parental genotype
- D. two distinct mating events where male and female traits are swapped between the crosses
- E. a cross that brings together two true-breeding individuals who are homozygous for different sets of traits
Matching Mendel's Foundational Principles of Genetics
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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. Two alleles for a character are randomly distributed into different gametes.
- B. Each pair of traits is passed down without any impact on the passage of other pairs during the creation of gametes.
- C. Each organism has two alleles that make up the characters for a given trait.
- D. In cases where contrasting alleles are present, the dominant allele determines the phenotype.
Matching Mendelian Genetics Terms and 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. genotype | ||
| 2. dominant | ||
| 3. alleles | ||
| 4. character | ||
| 5. homozygous |
Drag one of the choices below:
- A. identical alleles for a gene
- B. an allele that masks another allele in the presence of both alleles
- C. a feature that can be inherited and varies among organisms, like eye color
- D. variants of a gene, for example A or a
- E. combination of alleles that determines a specific trait
Monohybrid Cross Genotype-Phenotype Matching
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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. Half of the offspring display the recessive phenotype
- B. Produces offspring that are all homozygous recessive
- C. Produces only heterozygotes in progeny
- D. Yields offspring with 50% homozygous dominant and 50% heterozygous genotypes
- E. Results in all homozygous dominant offspring
- F. One-quarter of the offspring show the recessive phenotype
Identification of Mendelian Cross Generations
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Which one of the following Mendelian crosses and generational stages correspond to the description 'the second generation produced when F1 generation individuals are self-crossed or fertilized with each other'.
Mendel's Foundational Principles of Genetics
Click to show Mendel's Foundational Principles of Genetics example problem
Which one of the following Mendel's Foundational Principles of Genetics correspond to the description 'During the creation of gametes, each parent contributes a single allele for each characteristic.'.
Mendelian Genetics Terms Identification
Click to show Mendelian Genetics Terms Identification example problem
Which one of the following Mendelian genetics terms correspond to the definition 'a haploid reproductive cell having the half number of chromosomes'.
Monohybrid Cross Genotype Problem Solving
Click to show Monohybrid Cross Genotype Problem Solving example problem
Which one of the following parental genotypes in monohybrid crosses correspond to the description of the progeny 'Half of the offspring display the recessive phenotype'.