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Laws of Inheritance — Quiz Answers

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1
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What does the notation Rr mean to geneticists?

A
homozygous alleles
B
recessive alleles
C
dominant alleles
D
heterozygous alleles
2
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Why did Mendel study pea plants?

A
They reproduce asexually and have many traits that are easy to observe.
B
They reproduce asexually and have one trait that is easy to observe.
C
They reproduce sexually and have many traits that are easy to observe.
D
They reproduce sexually and have one trait that is easy to observe.
4

Which statement summarizes the law of segregation?

A
Gametes are passed in pairs, groups, or sets.
B
Traits are passed independently of one another.
C
Traits that are dominant mask traits that are recessive.
D
Gametes carry one allele for each trait.
5

What is a gene?

A
the appearance or characteristics that are seen in an organism
B
an organism's allele combination
C
the different forms of a trait
D
a segment of DNA that is the basic unit of heredity
6

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

A
Seventy-five percent are Ff.
B
Twenty-five percent are Ff.
C
Twenty-five percent have freckles.
D
Seventy-five percent have freckles.
8

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

A
25 percent white and 75 percent purple
B
50 percent white and 50 percent purple
C
100 percent purple
D
100 percent white
9

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

A
law of genetics
B
law of segregation
C
law of independent assortment
D
principle of dominance
10

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

A
the law of independent assortment
B
the principle of dominance
C
the principle of genetics
D
the law of segregation

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