Consider the following diploid cell, in which 2n = 8. The blue chromosomes carrying genes A, B, C, and D are maternal in origin, whereas the red chromosomes carrying genes a, b, c, and d are paternally derived.

 

Note: In spite of suspect discrepancies in the drawing, this cell contains only acrocentric and metacentric chromosomes.

Which gene(s) is/are found on the p arm of an acrocentric chromosome? (my answer A C)

A.B.C.D

Which gene(s) is/are found on a metacentric chromosome? (B.D)

A.B.C.D

If this cell undergoes meiosis, how many tetrads will form during prophase I? 4

Given a population of cells like this one that undergoes meiosis, what fraction of the gametes produced will have the genotype ABCD? 1/16

Given a population of cells like this one that undergoes meiosis, what fraction of the gametes produced will have two maternal chromosomes and two paternal chromosomes?

Given a population of cells like this one that undergoes meiosis, what fraction of the gametes produced will have some chromosomes of both maternal and paternal origin?

Transcribed Image Text:

6 6

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