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The shell of an egg forms around the embryo that will become the chick. The embryo is the white spot on the yolk (yellow part). The yolk is what the chick gets nourishment from while it grows. 

13 years ago. Rating: 4
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It is something that you should understand if you paid attention in biology, or health class.  The male, rooster inseminates the female, hen.  She will have his sperm in her reproductive tract, and it will begin to fertilize her ovum, female sex cell.  She manufactures the "egg" which is the artificial environment which the hen then incubates for 21 days until the embryo hatches into the chick.  This same process occurs in fish, birds, reptiles, amphibians.  In mammals, the embryo still is created the same way, but there is gestation (pregnancy) within the body of the mother.  Hope that this clears it up for you...

13 years ago. Rating: 4
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