Question

5. Homozygous black-colored (BB), wavy-haired (HH), with short coat (SS) female minks were mated with homozygous white-colored (bb), straight-haired (hh) and with long coat (ss) males. F1 females produced from the above cross were testcrossed with the white-colored, straight-haired, long-haired males:

Black, straight, long 42

White, wavy, short 38

Black, straight, short 7

Black, wavy, short 348

White, wavy, long 9

White, straight, long 356

Calculate the gene distance and construct the genetic map.
Question did not indicate if it was a 2 point or 3 point cross.

Answer 1

In this case NO double crossover occurs.

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