Question

Assume a three point cross in which the F1 aa ⁺ bb⁺ Dd⁺ was crossed to aabbdd and the offspring had the following genotypes:

GENOTYPES Number

aa ⁺ bb⁺ Dd⁺ 621

aa ⁺ bb⁺ Dd⁺ 3

aa ⁺ bb⁺ Dd⁺ 64

aa ⁺ bb⁺ Dd⁺ 103

aa ⁺ bb⁺ Dd⁺ 109

aa ⁺ bb⁺ Dd⁺ 57

aa ⁺ bb⁺ Dd⁺ 7

aa ⁺ bb⁺ Dd⁺ 608

i. Indicate the parental and recombinant genotypes

ii. Indicate the double recombinants

iii. Costruct a genetic map of these three loci, including their order and map distance bewteen them. 

Answer 1

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