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You have been trying to determine the genetic interaction between 2 genes that control coat colour...

You have been trying to determine the genetic interaction between 2 genes that control coat colour in mice (B and C). In monohybrid experiments, you have found that B (black) is dominant over b (brown). Using other true breeding strains in a separate monohybrid experiment, you determined that C (black mice) is dominant over c (albino mice). To determine how these genes interact, you performed a dihybrid cross between true breeding albino mice and true breeding brown mice. The F1 progeny were all black. Which of the following genetic interactions best explains this outcome.

Select one:

a. C is recessive epistatic to B.

b. B is dominant epistatic over C.

c. C and B exhibit complementary gene action.

d. B is recessive epistatic to C.

e. C is dominant epistatic over B.

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Answer #1

Answer:

c. C and B exhibit complementary gene action.

Back -B_C_

Brown- bbC_

albino-B_cc or bbcc

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