Chapter 1

A term used to describe the specific properties of a character, such as describing the eye color in a person as brown, is a ________.

• modification

• variant

• alteration

• mutation

A tall pea plant is crossed with a short pea plant. Which two of the following describe this cross?

• Two-factor cross

• Dihybrid cross

• Monohybrid cross

• Single-factor cross

In which of the following crosses would the offspring be called hybrids?

• A pea plant with yellow seeds crossed to another pea plant with yellow seeds

• A pea plant with yellow seeds crossed to a pea plant with green seeds

• A pea plant with green seeds crossed to another pea plant with green seeds

If a genetic study began with your grandparents, which generation would represent you and your siblings?

• F₂

• F₃

• P

• F₁

A trait that is expressed with either one or two of the same alleles is ______.

• dominant

• recessive

In pea plants yellow seeds are dominant to green seeds. What are the possible genotypes of a plant with yellow seeds?

• Yy

• yy

• YY

A trait that is masked by another trait but reappears in subsequent generations is Blank______.

• dominant

• recessive

As shown in the data table, a cross between a pea plant with round seeds and another with wrinkled produced all round seeds in the F₁ generation and 3:1 round:wrinkled seeds in the F₂ generation. Based on this data, what conclusion can be drawn?

• The wrinkled seed trait is dominant to round.

• The round seed trait and wrinkled seed trait are equally expressed.

• The round seed trait is dominant to wrinkled.

The term used to describe the basic unit of heredity that influences an organism's traits is a(n) .

Based on Mendel's law of independent assortment, an organism with the genotype AaBb should form gametes with which of the following ratios?

• 1 AA : 1 aa : 1 BB : 1 bb

• 9 AABB : 3 AABb : 3 AaBB : 1 aabb

• 1 AABB : 1: AABb : 1 AaBB : 1 aabb

• 9 AB : 3 Ab : 3 aB : 1 ab

• 1 AB : 1 Ab : 1 aB : 1 ab