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founder effect |
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founder effect extreme genetic drift that occurs when a new population is based on only a few individuals ('founders'). Called also founder principle. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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A geneticist armed with computer simulations of prehistoric populations says that only about 200 to 300 people crossed the ice age land bridge from Asia to become the founding population of North America. A relatively small founding population was fruitful and multiplied--aided in the 19th century by polygamy, which allowed husbands to have more than one wife. Accordingly, the distinct linguistic and cultural groups emerged after the expansion and radiation of the founding population throughout North, Central, and South America. |
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