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Question 1

A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that has wrinkled seeds and the genotype rr. What is the probability that the offspring will have wrinkled seeds?

Revolt · Accepted Answer

C: 50 percent

Question 2

Parents that are heterozygous for having freckles (dominant) are crossed. Which correctly describes their offspring?

Revolt · Accepted Answer

D: Seventy-five percent have freckles.

Question 3

What does the notation Rr mean to geneticists?

Revolt · Accepted Answer

A: heterozygous alleles

Question 4

Which of Mendel's laws or principles states that gametes carry one allele for each trait?

Revolt · Accepted Answer

A: law of segregation

Question 5

Two plants are heterozygous for seed shape and have round seeds. If the two plants are crossed, what is the probability that the offspring will have wrinkled seeds?

Revolt · Accepted Answer

A: 25 percent

Question 6

Why did Mendel study pea plants?

Revolt · Accepted Answer

A: They reproduce sexually and have many traits that are easy to observe.

Question 7

Which of Mendel's laws or principles explains that traits are passed from parents to offspring individually instead of as pairs, groups, or sets?

Revolt · Accepted Answer

A: the law of independent assortment

Question 8

What is a gene?

Revolt · Accepted Answer

B: a segment of DNA that is the basic unit of heredity

Question 9

Which statement summarizes the law of segregation?

Revolt · Accepted Answer

D: Gametes carry one allele for each trait.

Question 10

When Mendel crossed purebred purple flowering plants (PP) with purebred white flowering plants (pp), what were the flower colors of the resulting offspring?

Revolt · Accepted Answer

C: 100 percent purple

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