It is the contribution of father which determine the sex of new born .explain
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bcs the father's chromosome deside that the sex of new born baby will be girl or boy
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The male parent does. Sex is determined by two chromosomes, X and Y. A female is XX, a male is XY. Since women completely lack the Y choromosome, they always contribute an X chromosome to the baby. The sex is determined by whether the sperm that fertilizes the egg is carrying another X or a Y.
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