AnswersBiologyLaws of Inheritance

Pretest Answers

10 verified answers1 views
2
Free Preview

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

A
Twenty-five percent have freckles.
B
Twenty-five percent are Ff.
C
Seventy-five percent are Ff.
D
Seventy-five percent have freckles.
3

What does the notation Rr mean to geneticists?

A
heterozygous alleles
B
homozygous alleles
C
dominant alleles
D
recessive alleles
4

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

A
law of segregation
B
law of independent assortment
C
law of genetics
D
principle of dominance
6

Why did Mendel study pea plants?

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

A
the law of independent assortment
B
the principle of genetics
C
the law of segregation
D
the principle of dominance
8

What is a gene?

A
an organism's allele combination
B
a segment of DNA that is the basic unit of heredity
C
the appearance or characteristics that are seen in an organism
D
the different forms of a trait
9

Which statement summarizes the law of segregation?

A
Gametes are passed in pairs, groups, or sets.
B
Traits that are dominant mask traits that are recessive.
C
Traits are passed independently of one another.
D
Gametes carry one allele for each trait.
10

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

Did you find these answers helpful?