Combinations of chromosomes

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Reference no: EM1382621

Normal Drosophila melanogaster individuals have 2n=8 chromosomes. (a) How many ways can these chromosomes be assorted into gametes? (b) How many different chromosome combinations are possible when crossing 2 unrelated flies? (c) How would the number of combinations of chromosomes compare to the number of possible genotypes represented in this cross? Indicate whether you expect there to be fewer, equal numbers or more genotypic combinations. Briefly, explain your rationale for (a), (b) and (c) .

Also:

In Drosophila melanogaster, the white gene (w) is encoded on the X chromosome while the curly gene (Cy) can be found on chromosome 2. At the white locus, w+ (red eyes) is dominant over w (white eyes) while Cy (curly wings) is dominant over Cy+ (normal wings). If pure breeding females with white eyes and normal wings are crossed with red eyed males with curly wings. (a) What are the possible genotypes in the parental generation? (b) what genotypes and phenotypes are expected from this cross? Explain you reasoning briefly in (a) and (b).

Reference no: EM1382621

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