Why would you predict that half of the human babies born will be males and half will be females?

Question

a. because of the segregation of the X and Y chromosomes during male meiosis.
b. Is heterozygous for recessive condition.
c. Shows the dominant phenotype.
d. A and B
e. A and C

Answer 1

Considering females have two X chromosomes, after meiosis, their eggs are only capable of donating an X. However, males have an X and Y chromosome and thus each sperm donates either an X or Y after meiosis. All things being equal, this gives a 50/50 chance for an egg to be fertilized with an X or Y-carrying sperm and therefore the same 50/50 chance of having a boy or girl.

Answer 2

A. is correct