how does sex determination occurs...
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Sex determination. A baby's sex is determined at the time of conception. When the baby is conceived, a chromosome from the sperm cell, either X or Y, fuses with the X chromosome in the egg cell, determining whether the baby will be female (XX) or male (XY). ... This process is called sexual differentiation.
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there are 2 types of chromosomes present in a body they are call X,Y chromosomes...
if XX combines then baby boy is born....
if XY combines then baby girl is born.....
if XX combines then baby boy is born....
if XY combines then baby girl is born.....
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