Haldane's rule
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English
Etymology
Formulated in 1922 by the British evolutionary biologist J. B. S. Haldane.
Proper noun
- An observation about the early stage of speciation, stating that if in a species hybrid only one sex is inviable or sterile, that sex is more likely to be the heterogametic sex.
- 2018, Tim Flannery, Europe: The First 100 Million Years, Penguin, published 2019, page 181:
- One study hints at the possibility that Haldane's rule may have been the cause of the lack of Neanderthal DNA on the Y-chromosome of hybrids, but currently we do not definitively know.