Länk - Människor har en genetisk variation motsvarande en befolkning på tio tusen
The first people to point out that humans were short of genetic variation were John Maynard Smith and John Haigh, in 1974. They looked at the allelic variation of the beta globin gene and determined that it was consistent with a population of only 10,000 individuals. Since there are more than 10,000 people now, they needed some other explanation.
Läs mer: Cultural impedance, demographic growth, effective population size | john hawks weblog