AP Bio Unit 5 (B) Nonmendelian, Chi, Gene Maps

Crossing red flowering snapdragons with white flowering snapdragons yields seed that grow into snapdragons with pink flowers. This is an example of

• incomplete dominance

• codomainance

• simple dominance

• epistasis

Cystic fibrosis (CF) is caused by a recessive allele. A child has CF, even though neither of his parents has CF. What can you conclude about the parents?

• One is homozygous and one is heterozygous.

• Both are homozygous.

• Both are heterozygous.

• The child must have been adopted.

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Hemophila is a recessive, sex-linked trait. If a female who is a carrier for the hemophilia gene has a child with a male who does not have hemophilia, which prediction is correct?

• All of the sons will have hemophilia.

• All of the daughters will have hemophilia.

• Half of the sons will have hemophilia.

• Half of the daughters will have hemophilia.

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A father with type B blood and mother with type A blood have a child. Their child has discovered that her blood group is type O, during biology experiment at her school. Does she have any concerns about her parentage?

• Yes, because she should have type AB blood if they are her true biological parents

• No, because type O is possible if her parents both had genotype AB

• No, because both of her parents could be heterozygous

• Yes, because both of her parents might be hetrozygous

• No, because blood types A and B are codominant

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Which of these is an example of polygenic inheritance?

• Freckles

• Sickle Cell Anemia

• Duchenne muscular dystrophy

• Skin Color

• Color Blindness

Which occurs when a heterozygous genotype produces blended traits?

• Incomplete dominance

• Pure genotype

• Monosomy

• Codominance

• Trisomy

Epistasis controls the color of squash, with:

the B locus controlling color (yellow is dominant to green) and

E locus determining expression of B locus. This is a case of dominant epistasis. Which of the following is true?

• bbEe results in green squash

• Bbee results in yellow squash

• bbee results in yellow squash

• bbEe results in yellow squash

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In a specific type of flower the genes coding for color display codominance. What would you expect the phenotype to be for a cross between a flower homozygous for white coloration and a flower homozygous for red coloration?

• White

• Pink

• Red

• Distinct red and white spots

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If the chi square value is larger than the critical value at a given level of significance, what can be stated?

• The null hypothesis is rejected

• The null hypothesis fails to be rejected

• The alternative hypothesis is rejected

• The null hypothesis is accepted

Epistasis controls the fur color of labradors, with the B locus controlling color (Black is dominant to brown), and E locus determining expression of B locus. This is a case of recessive masking epistasis. Which of the following is true?

• BBee results in black fur

• bbee results in brown fur

• BbEe results in black fur

• bbEe results in black fur

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