what is meant by sex determination in heredity
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In humans and other mammals, biological sex is determined by a pair of sex chromosomes: XY in males and XX in females. Genes on the X chromosome are said to be X-linked. X-linked genes have distinctive inheritance patterns because they are present in different numbers in females (XX) and males (XY).
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A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. ... In many species, sex determination is genetic: males and females have different alleles or even different genes that specify their sexual morphology.
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