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If the d and e genes are 24cM apart in humans, and a DE/de woman mates...

If the d and e genes are 24cM apart in humans, and a DE/de woman mates with a de/de man, what is the probability that their first child will have the genotype DdEe?

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Answer #1

Question:

Answer:

Male : de/de

Female: DE/de

Alleles

de

de

DE

DdEe

DdEe

de

ddee

ddee

Probability of getting DdEe offspring in absence of linkage =2/4 = 0.5

But in presence of linkage, map distance between d and e = 24cM

Probability of getting DdEe offspring = (Probability of getting DdEe offspring in absence of linkage – probability of conversion DE into De or dE

= (0.5- (0.24/2)

= (0.5-0.12)

= 0.38          

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