Chapter 12 Review: Genetics

The study of ____ is called genetics.

• heredity

• pea plants

• dominance

• mutations

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Mendel concluded that _____ factors control each inherited trait.

• 2

• 3

• 4

• 5

Parents pass their traits down to their offspring through their __________.

• daughter cells

• son cells

• body cells

• reproductive cells

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Self-pollination is when the pollen lands on _____.

• the same plant

• the next plant over

• the person holding the plant

• a different species of plant

A true-breeding purple plant and a true-breeding white plant cross-pollinate. The offspring will be _____.

• all purple

• half purple, half white

• 75% purple, 25% white

• 75% white, 25% purple

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A genetic factor that blocks another genetic factor is called a(n) _____.

• genetic trait

• heredity trait

• recessive trait

• dominant trait

Blood type in humans is controlled by ____ alleles.

• 1

• 2

• 3

• 4

In a Punnett square, a capital letter stands for a ____ allele.

• recessive

• dominant

• homozygous

• heterozygous

Look at the Punnett square. If orange is a dominant allele and purple is recessive, what color ratio will the flowers of the offspring plants have?

• 1 purple: 3 orange

• 4 purple: 0 orange

• 2 purple: 2 orange

• 0 purple: 4 orange

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A man and a woman want to have a child, but the man is heterozygous (Cc) for a recessive trait that causes a fatal illness. What is the probability of a child’s inheriting the trait?

• 0%

• 25%

• 50%

• 75%

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