sex chromosome

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How is biological sex determined?

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Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd

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Study reveals how silent X chromosome enhances female brain resilience • Mar. 6, 2025, 3:24 AM ET (News-Medical)

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How is biological sex determined?

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X chromosome Y chromosome Barr body androgen insensitivity syndrome Klinefelter syndrome Turner syndrome XYY-trisomy trisomy X superfemale 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