AP Biology Genetics

The fact that all seven of the garden pea traits studied by Mendel obeyed the principle of independent assortment means that the

• haploid number of garden peas is 7
• seven pairs of alleles determining these traits are on the same pair of homologous chromosomes
• seven pairs of alleles determining these traits behave as if they are on different chromosomes
• formation of gametes in plants is by mitosis only

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NGSS.HS-LS3-2

Given the parents AABbCc x AabbCc, assume simple dominance and independent assortment. What proportion of the progeny will be expected to phenotypically resemble the first parent? 

• 1/4
• 1/8
• 3/4
• 3/8

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NGSS.HS-LS3-2

Vermilion eyes is a sex-linked recessive characteristic in fruit flies.  If a female having vermilion eyes is crossed with a wild-type male, what proportion of the F1 males will have vermilion eyes?

• 100%
• 25%
• 50%
• 75%

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which genes would show the highest frequency of crossing over?

• A-B
• A-D
• D-C
• B-C

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NGSS.HS-LS3-2

What is the most probable mode of inheritance?

• X linked dominant
• autosomal dominant
• X linked recessive
• autosomal recessive

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

A couple who are both carriers for the gene for cystic fibrosis have two children who have cystic fibrosis.  What is the probability that their next child will have cystic fibrosis?

• 0%
• 25%
• 50%
• 75%

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NGSS.HS-LS3-3

A woman with type O blood and a man with type AB have a child.  What is the percent chance that the child has type B?

• 0%
• 25%
• 50%
• 100%

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NGSS.HS-LS3-1

NGSS.HS-LS3-3

Males are more often affected by sex-linked traits than females because

• males only have an X chromosome.

• male hormones such as testosterone often exacerbate the effects of mutations on the X chromosome

• female hormones such as estrogen often compensate for the effects of mutations on the X.

• X chromosomes in males generally have more mutations than X chromosomes in females.

Which of the following is an example of polygenic inheritance?

• pink flowers in snapdragons

• The ABO Blood group in humans

• Skin color in humans

• Huntington's disease in humans

Females with Turner's syndrome have a high incidence of hemophilia, a recessive, X-linked trait. Based on this information, it can be inferred that females with this condition

• Have an extra X chromosome

• Have an extra Y chromosome

• Lack a X chromosome

• Have red blood cells that tend to clump.

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NGSS.HS-LS3-1