Scientist studying high-elevation adaptations in Tibetans discovered that the EPAS1 allele favored at high elevations first appeared in the Denisovan genome and entered the human genome when Denisovan and ancestral Tibetans interbred. This is an example of

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Introgression refers to the transfer of genetic information from one species to another as a result of hybridization between them and repeated backcrossing. The case of the EPAS1 allele moving from Denisovans to Tibetans due to interbreeding is a classic example of introgression, where genes from one species (Denisovans) are incorporated into the genome of another species (humans), enhancing the latter's adaptation to their environment (high elevations in this case).

Scientist Studying High-Elevation Adaptations in Tibetans Discovered That the EPAS1