what is sex determination
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A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most organisms that create their offspring using sexual reproduction have two sexes. Occasionally, there are hermaphrodites in place of one or both sexes.
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It is to know the sex of an organism ..
Physically:in boys development of penis, scrotum,voice becomes heavy, appearance of hair on face.
in girls: development of breasts,pitched sound,hair on pubic region.
Biological:on the basis of chromosomes ,if xx then girl and if XY then boy
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