Why is it a 50-50 chance that a baby will be a boy/girl rather than something else, like 55-45, etc.?
Name:
Anonymous2007-11-26 15:35
In mammals, the egg carries an X chromosome and the sperm has a 50-50 chance of carrying an X or Y chromosome. The sex of the offspring is dependent on which chromosome the fertilizing sperm carries (X or Y).