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| Klinefelter's syndrome |
a congenital disorder that causes sterility in males, caused by an extra X chromosome. |
| sex-linkage |
in genetics, an association between certain inherited traits and sex, the genes for those traits being carried on one of the sex chromosomes. |
| X chromosome |
the sex chromosome that occurs paired in females and singly in males, and is responsible for female sex characteristics. (Cf. Y chromosome.) |
| Y chromosome |
a sex chromosome that occurs only in males, paired with an X chromosome, and is responsible for male sex characteristics. (Cf. X chromosome.) |
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