Item 6 Consider the following diploid cell, in which 2n = 8. The blue chromosome
ID: 56612 • Letter: I
Question
Item 6
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.
Part D
Given a population of cells like this one that undergo meiosis, what fraction of the gametes produced will have the genotype ABCD?
Enter your answer as a fraction.
Part E
Given a population of cells like this one that undergo meiosis, what fraction of the gametes produced will have two maternal chromosomes and two paternal chromosomes?
Enter your answer as a fraction.
Part F
Given a population of cells like this one that undergo meiosis, what fraction of the gametes produced will have some chromosomes of both maternal and paternal origin?
Enter your answer as a fraction.
Explanation / Answer
ABCD x abcd
D) Fraction of the gametes produced will have the genotype ABCD = 1/ 16 = 0.0625
E)Fraction of the gametes produced will have two maternal chromosomes and two paternal chromosomes = 1/4 = 0.25
F)Fraction of the gametes produced will have some chromosomes of both maternal and paternal origin = 1/2 = 0.5
male/female A B C D a Aa aB aC aD b Ab Bb bC bD c Ac Bc Cc cD d Ad Bd Cd DdRelated Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.