Question

All human egg cells have what sex chromosome? What about human sperm cells? Which cell, then, determines the sex of the next offspring? What are the chances of having a boy or girl for each pregnancy?

Answer 1

Human egg cells have two X chromosomes while sperm cells have either an X or Y chromosome. The sex of the next offspring is determined by the sperm that fertilizes the egg, with a 50% chance of having a boy or a girl for each pregnancy.

Step-by-step explanation:

Human egg cells have two X chromosomes (XX), while human sperm cells have either an X chromosome (X) or a Y chromosome (Y). The sex of the next offspring is determined by the sperm cell that fertilizes the egg. If a sperm with an X chromosome fertilizes the egg, the offspring will be female (XX). If a sperm with a Y chromosome fertilizes the egg, the offspring will be male (XY).

The chances of having a boy or girl for each pregnancy are generally considered to be equal, with a 50% chance of having a boy and a 50% chance of having a girl.