Probability of Inheritance

Question 1

Which includes the physical characteristics of an organism?

Revolt · Accepted Answer

phenotype

Question 2

The Punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. The Punnett square below examines the chance of offspring having freckles, which is a dominant trait.Based on the Punnett square, what is the probability that the offspring will have freckles?

Revolt · Accepted Answer

75 percent

Question 3

Which describes the mating of organisms that have different homozygous alleles for a single trait?

Revolt · Accepted Answer

monohybrid cross

Question 4

Why did Gregor Mendel choose to use purebred plants in his experiments?

Revolt · Accepted Answer

They exhibit only one form of a trait.

Question 5

A dihybrid cross is created from plants that are heterozygous for both round seeds and yellow seed color. What is the ratio of offspring that have round seeds and yellow seed color?

Revolt · Accepted Answer

9:16

Question 6

The offspring of a particular cross are 100 percent heterozygous for the trait of plant height. What were the most likely genotypes of the parents?

Revolt · Accepted Answer

TT ´ tt

Question 7

A plant can produce either purple flowers or white flowers. The purple flower color is dominant over the white flower color. What is the ratio of the offspring with purple flowers to the total number of offspring if two plants that are heterozygous for purple flowers are crossed?

Revolt · Accepted Answer

3:4

Question 8

Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower. What will the ratio of purple to white be?

Revolt · Accepted Answer

3:1

Probability of Inheritance Answers

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