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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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Most popular questions from this chapter

A heterozygous pea plant produces violet flowers and yellow, round seeds. Describe the expected genotypes of the gametes produced by Mendelian inheritance. If all three genes are found on the same arm of one chromosome should a scientist predict that inheritance patterns will follow Mendelian genetics?

If black and white true-breeding mice are mated and the result is all gray offspring, what inheritance pattern would this be indicative of?

a. dominance

b. codominance

c. multiple alleles

d. incomplete dominance

Why is it more efficient to perform a test cross with a homozygous recessive donor than a homozygous dominant donor? How could the same information still be found with a homozygous dominant donor?

Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?

Consider a cross to investigate the pea pod texture trait, involving constricted or inflated pods. Mendel found that the traits behave according to a dominant/recessive pattern in which inflated pods were dominant. If you performed this cross and obtained 650 inflated-pod plants in the F2 generation, approximately how many constricted-pod plants would you expect to have?

a. 600

b. 165

c. 217

d. 468
See all solutions

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