Embryo Cell number: At fertilization, one sperm enters the egg cell (2 cells) and in short while the egg nucleus and sperm nucleus merge to form one cell, called a zygote. The sperm and the egg each had 23 chromosomes, .
Answered 3/16/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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