sex chromosome

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trisomy X superfemale X chromosome Y chromosome Barr body androgen insensitivity syndrome Klinefelter syndrome Turner syndrome XYY-trisomy sex bisexuality sexual differentiation karyotype autosome sexual dimorphism unisexuality sex hormone gene major histocompatibility complex telomere

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Key People

Stevens, Nettie

Nettie Stevens

American biologist and geneticist

Clarence E. McClung

American zoologist