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

  1. AABB and aabb individuals were crossed to each other, and the F1 generation was backcrossed to the aabb parent. 995 AaBb, 997 aabb, 3 Aabb, and 5 aaBb offspring resulted.

  1. How far apart are the a and b loci?
  2. What progeny and in what frequencies would you expect to result from testcrossing the F1 generation from a AAbb X aaBB crosss to aabb?
  3. In a typical meiosis, how many crossovers occur between genes A and B?
  4. Assume that the A and B loci are on the same chromosome, but the offspring from the testcross described above were 496 AaBb, 504 aabb, 502Aabb, and 498 aaBb. How would your answer to part (c) change.
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