Question

1. which of the following best describes a heterozygous genotype?

a. having two different alleles for a gene

b. having only dominant alleles

c. having two identical alleles for a gene

d. having only recessive alleles

1. if two heterozygous individuals for a particular trait (aa x aa) have offspring, what is the genotypic ratio of the offspring?

a. 1:2:1

b. 2:1:1

c. 1:1

d. 3:1

1. which of the following represents a heterozygous genotype?

a. bb

b. ff

c. aa

d. qq

Explanation:

Question 4

To determine the correct option, recall the definition of a heterozygous genotype. A heterozygous genotype has two different alleles for a gene (e.g., Aa). Option b (only dominant alleles, like AA) and d (only recessive alleles, like aa) are homozygous dominant and homozygous recessive, respectively. Option c (two identical alleles) is homozygous. So option a matches the definition.

Step1: Set up Punnett square

For \( Aa \times Aa \), the possible gametes from each parent are \( A \) and \( a \). The Punnett square is:

A

a

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Answer:

a. Having two different alleles for a gene

Question 5