in the truit fly Drosophhila a spineless no wing bristles.pdf

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A genetic cross was performed between mutant and wild-type fruit flies to determine gene order and recombination frequencies. Wild-type females were crossed with mutant males that were claret and hairless. The progeny from wild-type females and mutant males were then crossed with fully mutant males. Offspring showed different combinations of traits indicating the order and distances between genes.

Formation

in the truit fly. Drosophhila, a spineless (no wing bristles, s+ ) female fly is mated to a male that is
claret (dark eyes, cvs + ) and hairless (no thoracic bristles, h vs. + ). Phenotypically wild-type
F1female progeny were mated to fully homozygous (mutant) males, and the following progeny
(1000 total) were: observed: +++sc++c++ch5ch++h5+h32138330183093214012 1. Give the gene
order 2. Calculate frequencies of SCO 3. Draw a map

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