Part B - Determining gamete genotypes in trihybrid crosses You have also identif

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Part B - Determining gamete genotypes in trihybrid crosses You have also identified a third recessive mutation that you call crimson. Wasps homozygous for crimson have a red abdomen. (Wild-type abdomens are yellow.) You make pure-breeding crimson (cc) and triple-mutant (apricot, blunt, crimson) lines. To map the three loci, you perform a trihybrid (three-point) testcross: You first cross crimson wasps with (apricot, blunt) wasps to make an F1, and then you testcross the F1 with the triple-mutant line. The testcross progeny have eight phenotypes. For each phenotype, determine the genotype of the gamete it received from the F1 trihybrid.

Parental lines AABBcc x aabbCC Testcross of Fi trihybrid AaBbCc x aabbcc F, trhyrid abc Abc aBc ABC abc AbC aBc ABC Progeny wild type phenotypes apricot, blunt, crimson : apricot, blunt crimson blunt apricot, crimson blunt, crimson aprcot

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