Using a software program called BOTTLENECK, the two searched for the signature of bottlenecks or founder effects in each population to see if the loss of diversity occurred suddenly or gradually as adjacent populations moved farther from Africa. (sciencemag.org)
Allele frequency differences between groups in India are larger than in Europe, reflecting strong founder effects whose signatures have been maintained for thousands of years owing to endogamy. (nature.com)
This recursive founder effect at the front can provide an environment that promotes cooperation. (nimbios.org)