X chromosome

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English[edit]

Etymology[edit]

Named by Hermann Henking in 1890 from x (signifying the unknown) due to some baffling properties he had observed. The brief resemblance in the appearance of the X chromosome to the letter "X" during cell division is entirely coincidental.[1]

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Noun[edit]

X chromosome (plural X chromosomes)

  1. (genetics) A mammalian sex chromosome. Cells of females have a pair of X chromosomes while cells of males have an X and a Y.

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References[edit]

  1. ^ David Bainbridge, The X in Sex: How the X Chromosome Controls Our Lives, pages 65-66, ISBN 0674016211.