You have likely heard people say "the father is the one who determines the sex of the child." Explain whether or not this is true

What will be an ideal response?

Females' eggs have two X chromosomes and males' sperm contains either an x or a y. When a zygote is formed, it always gets an x from the female, but it can get either an x or a y from the male. If it gets a y, the result is a male, if it gets an x, it becomes a female.