The mother of these progeny resulted from a cross between two flies from true breeding lines.What are the genotypes of these two lines?
A) pr pr cn+ cn+ and pr+ pr+ cn cn
B) pr+ pr+ cn+ cn+ and pr pr cn cn
C) pr+ pr cn+ cn and pr pr cn cn
D) pr+ pr cn cn and pr pr cn+ cn
E) Either pr pr cn+ cn+ and pr+ pr+ cn cn or pr+ pr+ cn+ cn+ and pr pr cn cn could be true.
Correct Answer:
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