how is sex determination in human beings done?
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Sex in humans is determined by the type of male haploid gamete that fuses with the female egg. The chromosome in the 23rd pair of a male gamete can be either X or Y. ... male child (44A + XY) is the result of Fertilization of egg (22 + X) with a sperm carrying 22+Y chromosomes.
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In humans, sex is determined by sex chromosomes (XX females, XY males). The X and Y chromosomes harbor dramatically different numbers and sets of genes (about 1,000 genes on the X and only a few dozen genes on the Y), yet they originated from ordinary autosomes during the early evolution of mammals (Figure 1).
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