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Chapter 12: Q. 11 (page 326)

A recessive trait will be observed in individuals that are ________ for that trait.

a. heterozygous

b. homozygous or heterozygous

c. homozygous

d. diploid

Short Answer

Expert verified

The correct answer is option c

Step by step solution

01

Step 1. Introduction

Recessive traits are those traits that are expressed only when genotype is homozygous.

02

Step 2. Explanation of the correct options

Option c is correct because recessive traits will be observed only when the individuals are homozygous for that trait because for the recessive traits to appear, there should be two recessive alleles (homozygous) otherwise dominant alleles in heterozygous will show dominant traits.

03

Step 3. Explanation of the incorrect options

Option a is incorrect because recessive traits will be observed only when the individuals are homozygous for that trait instead of heterozygous.

Option b is incorrect because recessive traits will be observed only when the individuals are homozygous for that trait instead of both heterozygous and homozygous.

Option d is incorrect because recessive traits will be observed only when the individuals are homozygous for that trait instead of diploid.

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Figure 12.12 What ratio of offspring would result from a cross between a white-eyed male and a female that is heterozygous for red eye color?

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