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SlideshowReport

Linkage and recombination of alleles.

Description
An experimenter crossed b+b+c+c+ and bbcc flies to produce F1 heterozygotes. F1 females were then testcrossed to bbcc males. The large number of parental phenotypes in the F2 generation suggests that the two genes are linked on the same chromosome. F2 recombinant phenotypes occur because the alleles can be rearranged by crossing over.
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