The map indicates the order of genes on a chromosome and the number of map units

Question

The map indicates the order of genes on a chromosome and the number of map units between adjacent gene pairs. Give the expected frequency of gametes produced by organisms with the following genotypes. Assume one map unit equals 1% recombination and that interference is zero.

Ad/aD (As the starting gametes, find:)

Frequency of gametes:Ad____ %,aD____%,AD____%,ad____%.

DeF/dEf

Frequency of gametes:Def____ %,dEf____%,Def____%,deF____%,dEF____%,DEF____%def____%.

BdE/bde

Frequency of gametes:BdE____ %,bde____%,Dde____%,bdE____%.

How do you go about this problem?

Explanation / Answer

Part B: Parental genotype frequency: 1/2 x (1-0.1) x (1-0.18) Recombinant: take into account single and double cross over events: 1/2 x 0.1 x 0.82 + 1/2 x 0.9 x 0.18 + 1/2 x 0.1 x 0.18

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