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Genetics Recombination Frequency Problem

niall
in Homework Help

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Hey guys, Im really struggling getting my head around the math involved in these types of questions, can anyone work through it with me?

Thanks, N

The question I've been set is:

 

With what frequency would the phenotype a b C appear in the descendancy when the following cross is carried out in D.melanogaster?

Females a B c/A b C x Males A B c/a b C,

taking into account that the recombination frequency between A and B is 0.20, between B and C is 0.15, and the coefficient of coincidence is 0.25.

 

Edited by niall

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