Question

The genes A, B, and C are tightly linked to each other on the same chromosome....

The genes A, B, and C are tightly linked to each other on the same chromosome. The genes are 2 map units away from each other. A-B=2 map units, B-C=2 map units, and A-C= 4 map units.

You cross an organism that AABBCC to one that is aabbcc. You take the F1 heterozygote and cross it to aabbcc. How many offspring should you screen to observe the rare event (a double crossover progeny?)

1 – (probability of not getting rare event)n = 0.95

  1. 73
  2. 7489
  3. 36
  4. 148
  5. 14978
0 0
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Option A 73 is correct.

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