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AABB and aabb individuals were crossed to each other, and the F1 generation was backcrossed to...

AABB and aabb individuals were crossed to each other, and the F1 generation was backcrossed to the aabb parent. 993 AaBb, 995 aabb, 5 Aabb, and 7 aaBb offspring resulted.

a. How far apart are the a and b loci?

b. What progeny and in what frequencies would you expect to result from testcrossing the F1 generation from a AAbb X aaBB crosss to aabb?

c. In a typical meiosis, how many crossovers occur between genes A and B?

d. Assume that the A and B loci are on the same chromosome, but the offspring from the testcross described above were 494 AaBb, 506 aabb, 505Aabb, and 495 aaBb. How would your answer to part (c) change.

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