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In a three-point testcross, it was found that the genetic map for three linked genes was:...

In a three-point testcross, it was found that the genetic map for three linked genes was:
A-----30 m.u.------B------20 m.u.-----C.
A genetic cross was performed and it the outcome was, that of 1000 progeny, 1 double recombinant was observed. How
does this compare to what we would have expected? Interpret and explain this genetic phenomenon?

Solutions

Expert Solution

Crossing over doesn't occur uniformly along a chromosome. The formation of chiasma will reduce the chances of another chiasma formation in an adjacent region of chromosome. This is known as interference. Because of interference fewer double crossover types will be observed than expected DCO. Here, is the explanation to the answer in Handwritten solution:

gladiator answered 2 years ago
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