Answer to Question #317838 in Genetics for Nhlonipho Manganyi

Question

A researcher has two pure breeding strains of fruit flies: strain A and strain B.

Strain A produces only enzyme A and strain B only enzyme B. The alleles coding for enzyme A and enzyme B are the only alleles involved here and occur at the same locus.

The researcher crossed a fly from strain A with one from strain B and found that all the offspring (F1 generation) could produce both enzyme A and enzyme B. When he crossed two of the F1 generation flies, he found the following in the offspring:

658 produced enzyme A, 1364 produced enzyme A and B, 581 produced enzyme B

2.What would the expected result be if one of the offspring that can produce both enzyme A and enzyme B were crossed with one that can only produce enzyme A? Use a Punnett Square to demonstrate the expected outcome using appropriate symbols.

Answer 1

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