Understand epistasis

Practice Questions

AP Biology › Understand epistasis

Questions
6
1

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?

2

In a case of recessive epistasis, A is epistatic to B, and B is dominant to b, which genotype will give the dominant phenotype?

3

Which of the following is true?

4

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?

5

Snapdragons’ color is controlled by recessive epistasis, with the B locus controlling color and the A locus determining expression of B locus. B (red) is dominant to b (yellow) Which of the following is false?

6

When two genes interact, and one gene masks the expression of a second gene, the first gene is __ to the second or ___ gene

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