What is the significance of XX and XY chromosomes in human beings.
Explain the mechanisms of sex determination.
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In humans, females are homomorphic (XX) and males have heteromorphic sex chromosomes (XY). During meiosis, all the gametes produced by females contain only the X chromosome (22 A + X), whereas males produce two kinds of gametes, 1/2 gametes with X - and 1/2 with Y-chromosome (22 A + X and 22 A + Y).
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In humans, females are homomorphic (XX) and males have heteromorphic sex chromosomes (XY). During meiosis, all the gametes produced by females contain only the X chromosome (22 A + X), whereas males produce two kinds of gametes, 1/2 gametes with X - and 1/2 with Y-chromosome (22 A + X and 22 A + Y).
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