Dictionary of Human Evolution and Biology

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Y Chromosome Genes

Genes located specifically on the Y chromosome, such as the SRY gene that determines the male sex, and another that controls differentiation of the testes. Only 251 genes have been mapped to the human Y chromosome, the fewest of any chromosome. The male-specific region of the Y chromosome forms 95% of the chromosome, and contains about 78 mapped genes. Intrachromosomal repetitive sequences and palindromes are abundant in the Y; of about 800 sequence markers, about 20% have multiple locations.

See pseudogene and Y chromosome DNA.

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