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A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. Most sexual organisms have two sexes. Occasionally, there are hermaphrodites in place of one or both sexes. 
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Sex determination will be dependent on male or female. in male, the chromosomes will be X and Y. in female the sex chromosomes will be X and X. when XY joins the product will be male baby. when XX joins the baby will be girl.
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