A female results when the father's sperm contributes a(n)___ chromosome to the mother's ___ chromosome.

Question

Quizplus · Accepted Answer

Females have two X chromosomes, and they inherit one X chromosome from each parent. So, when the father's sperm contributes an X chromosome and the mother's egg contributes another X chromosome, a female child is formed with XX chromosomes. Choice B is incorrect because the father's sperm contains either an X or a Y chromosome, while the mother's egg always contains an X chromosome. Choice C is incorrect because the combination of two Y chromosomes cannot produce a viable pregnancy. Choice D is incorrect because there is no O chromosome; humans have 23 pairs of chromosomes, including one pair of sex chromosomes (XX or XY).

A Female Results When the Father's Sperm Contributes A(n)___ Chromosome