Female flies homozygous for gray body (blk^+) and red eyes (v^+), were crossed w
ID: 322433 • Letter: F
Question
Female flies homozygous for gray body (blk^+) and red eyes (v^+), were crossed with male flies with black body (blk) and vermilion eye colour (v). All the F_1 generation had gray bodies and red eyes. The F1 females were testcrossed to black-bodied, vermilion-eyed males. The F2 progeny were sorted by phenotype and counted: 162 gray-bodied, red-eyed flies; 149 black-bodied, vermilion-eyed flies; 77 gray-bodied, vermilion- eyed flies; and 72 black-bodied, red-eyed flies. Calculate the frequency of recombination.Explanation / Answer
Recombination frequency = (No of recombinant / total progeny) x 100
No. of recombinanats= 77 +72 = 149
Total no. of progeny = 162 + 149 + 77 + 72 = 460
Recombination frequency = 32.39 % or 0.3239
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