from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Producing dissimilar gametes, such as those of human males, who produce two types of spermatozoa, one bearing the X-chromosome and the other bearing the Y-chromosome.
  • adj. Of or relating to heterogametes.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. That produces heterogametes
  • adj. That produces different forms of the same gamete e.g. spermatozoa containing either an X- or a Y-chromosome.


Sorry, no etymologies found.


  • Morgan's first papers dealt with the demonstration of sex linkage of the gene for white eyes in the fly, the male fly being heterogametic.

    Thomas H. Morgan - Biography

  • A theory1 of sexes might propose a causal explanation for the actual historic phenomenon of the origin and maintenance of sexual reproduction in animals, addressing such issues as the heterogametic basis of sex determination.


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