what are the normal chromosome numbers of a sperm,egg,and zygote cells
A process called meiosis makes sure that when a gamete is made, the sperm or the egg cell each only has 23 chromosomes, half of the original number, so that when they join to form a zygote when fertilization occurs, the zygote will have a total of 46 chromosomes, like every cell in a human does. So the answer is 23.