Consider the following threefactor trihybrid testcross Calcu

Consider the following three-factor (trihybrid) testcross: Calculate the number of expected individuals of A^+a bb C^+ C genotype if 1000 progeny result from this testcross. About 102 About 46 About 130 About 65

Solution

Answer: About 46

Explanation:

map unit distance = % of recombination frequency

A+ B+ c/a b C+ individual produces 10.6% of A+ b C+ and a B+ c gametes (each 5.3%) produced.

Out of 1000, 106 A+ b C+ and a B+ c gametes (each 53) are produced.

Double cross over progeny= 0.106 * 0.134 * 1000 = 14

Double cross over progeny must be substracted rom single cross over expected progeny to get real single cross over progeny.

106-14 = 92

Out of 92, A+ b C+ are 46 and a B+ c gametes 46 are produced.