Human Genetics Problem Set

Problem 9: Sex determination in humans

A.	Because of the segregation of the X and Y chromosomes during male meiosis. Sex is determined by the sex chromosome in the sperm that fertilizes the female egg. Half of the sperm have an X chromosome and half have a Y chromosome.
B.	Because of the segregation of the X chromosomes during female meiosis.
C.	Because all eggs contain an X chromosome.
D.	Because, on average, one-half of all eggs produce females.
E.	Because of the formation of the Barr body early during embryonic development.