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Chapter 12: Q. 10 (page 326)

The observable traits expressed by an organism are described as its ________. a. phenotype b. genotype c. alleles d. zygote

Short Answer

Expert verified

Option a is correct.

Step by step solution

01

Step 1. Introduction

Specific characteristics of an organism are known as traits. These traits can be determined by the gene, environment, or by both gene and environment.

02

Step 2. Explanation of the correct option

Option a is correct because the phenotype refers to the physical appearance for the specific feature.

03

Step 3. Explanation of the incorrect option

Option b is incorrect because genortype is a gentic constitution of any particular traits.

Option c is incorrect because allels refers to the alternative forms of the gene.

Option d is incorrect because zygote is a fertilized egg result form the fertilization of ova and sperms.

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Most popular questions from this chapter

How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits when the traits behave in a dominant and recessive pattern? How many phenotypes? a. 64 genotypes; 16 phenotypes b. 16 genotypes; 64 phenotypes c. 8 genotypes; 27 phenotypes d. 27 genotypes; 8 phenotypes

Imagine you are performing a cross involving seed color in garden pea plants. What F1offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over the green.

a. 100 percent yellow-green seeds

b. 100 percent yellow seeds

c. 50 percent yellow, 50 percent green seeds

d. 25 percent green, 75 percent yellow seeds

Use the probability method to calculate the genotypes and genotypic proportions of a cross between AABBCc and Aabbcc parents

Assuming no gene linkage, in a dihybrid cross of AABB x aabb with AaBb F1 heterozygotes, what is the ratio of the F1 gametes (AB, aB, Ab, ab) that will give rise to the F2 offspring?

a. 1:1:1:1

b. 1:3:3:1

c. 1:2:2:1

d. 4:3:2:1

A farmer raises black and white chickens. To his surprise, when the first generation of eggs hatch all the chickens are black with white speckles throughout their feathers. What should the farmer expect when the eggs laid after interbreeding the speckled chickens hatch?

a. All the offspring will be speckled.

b. 75% of the offspring will be speckled, and 25% will be black.

c. 50% of the offspring will be speckled, 25% will be black, and 25% will be white.

d. 50% of the offspring will be black and 50% of the offspring will be white.
See all solutions

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