AP Biology : Apply 3 laws of inheritance to meiosis

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #1 : Apply 3 Laws Of Inheritance To Meiosis

Which is not true during meiosis?

Possible Answers:

Each gamete receives a random number of alleles for each gene from each parent

Each gamete receives one allele for each gene from each parent

Each gamete receives two alleles for each gene from only one parent

Each gamete receives two alleles for each gene from each parent

Correct answer:

Each gamete receives one allele for each gene from each parent

Explanation:

According to the Law of Segregation, each gamete receives one allele for each gene from each parent. During Meiosis, each parent’s two copies of each allele are separated from each other, then the gamete receives one copy of each allele from each parent (for a total of two alleles).

 

Example Question #2 : Apply 3 Laws Of Inheritance To Meiosis

The law of independent assortment states that ______________________. 

Possible Answers:

inheritance of a specific gene is not influenced by other genes

each gamete receives one allele for each gene from each parent

genes that are further apart will be less likely to be inherited together 

genes that are on the same chromosome are inherited together

Correct answer:

inheritance of a specific gene is not influenced by other genes

Explanation:

This is the definition of the law of independent assortment; during meiosis, the inheritance of one gene does not influence whether another, separate gene will also be inherited by that gamete.

Example Question #3 : Apply 3 Laws Of Inheritance To Meiosis

 According to Mendel’s Law of Dominance, the phenotype of a heterozygote will be ______________________ . 

Possible Answers:

determined by the mother’s genotype

determined by the recessive allele

determined by the dominant allele

a mixture of the phenotypes of both parents

Correct answer:

determined by the dominant allele

Explanation:

According to the Law of Dominance, each individual has two alleles for each trait and only the dominant allele contributes to the phenotype.

 

Example Question #2263 : Ap Biology

During what process do homologous chromosomes segregate into different gametes? 

Possible Answers:

Cytokinesis

DNA replication

Meiosis

DNA synthesis

Correct answer:

Meiosis

Explanation:

According to the Law of Segregation, during Meiosis, homologous chromosomes segregate into different gametes.

 

Example Question #5 : Apply 3 Laws Of Inheritance To Meiosis

Which law of inheritance is incorrectly matched to its explanation?

Possible Answers:

Law of independent assortment; inheritance of one gene does not influence inheritance of another gene

Law of dominance; in a heterozygote individual, only the dominant allele will influence the phenotype

Law of segregation; each gamete receives both copies of gene from its parent

Law of segregation; each gamete receives only one copy of each gene from its parent

Correct answer:

Law of segregation; each gamete receives both copies of gene from its parent

Explanation:

The laws of inheritance include the laws of segregation (each gamete receives only one copy of each gene from its parent), dominance (in a heterozygote individual, only the dominant allele will influence the phenotype), and independent assortment (inheritance of one gene does not influence inheritance of another gene)

Example Question #1 : Apply 3 Laws Of Inheritance To Meiosis

In a dihybrid cross of seed color and seed shape, Y (yellow) is dominant to y (green) and R (rounded) is dominant to r (wrinkled). An individual with genotype YyRr is crossed with an individual with genotype YYRr. The inheritance of the alleles for seed color does not affect inheritance of genes for seed shape. Which law supports this statement?

Possible Answers:

Law of random mating

Law of dominance

Law of independent assortment

Law of segregation

Correct answer:

Law of independent assortment

Explanation:

The law of independent assortment states that inheritance of one gene does not influence inheritance of another gene. Thus, inheritance of seed color does not affect the inheritance of seed shape.

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