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(Created page with "== Introduction == The Y chromosome is one of the two sex chromosomes in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it carries the gene SRY, which determines male sex characteristics. A Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes. == Structure and Composition == The Y chromosome is one of the smallest human chr...") |
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[[Image:Detail-145861.jpg|thumb|center|A photograph of a Y chromosome under a microscope. The chromosome is Y-shaped and stained a dark color.]] | |||