Which of the following explains the fact that the Y chromosome carries nonessential information?
a) A man who inherits two or three Y chromosomes as a result of an error in meiosis is fully normal.
b) Women don't have a Y chromosome and are not genetically disadvantaged.
c) Sperm contribute no genetic information to the egg in fertilization.
d) Eggs that are not fertilized can still develop into normal human beings.
e) Males are not needed in sexually reproducing species.
Answer: b) Women don't have a Y chromosome and are not genetically disadvantaged.