ShabelEvol4 - Bio 1B, Summer 2009 Professor Alan Shabel...

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Bio 1B, Summer 2009 Evolution, Lecture 4 Professor Alan Shabel Page 1 of 1 Updated on 25 June 2009 EVOLUTION, LECTURE 4: POPULATION GENETICS AND NATURAL SELECTION (479–486) Mendelian inheritance was rediscovered in 1900, and by the 1920s there was a consensus that all biological inheritance was a function of particulate genes. The foundations of modern population genetics was established during the 1920s, and during the decade from 1936–1947, Mendelian inheritance, population genetics, and Darwinism were unified in the Modern Evolutionary Synthesis , or the worldview known as neo-Darwinism . The ideas from that period form the basis of our understanding of microevolution today. G. H. Hardy and W. Weinberg independently derived what is now known as the Hardy- Weinberg Principle , a prediction of the allele and genotype frequencies of a group of offspring given the allele frequencies of the parental generation. The H-W principle demonstrates that, in the absence of external forces, allele and genotype frequencies do not change across generations. This is important because if allelic frequencies
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This note was uploaded on 07/04/2009 for the course BIO 1B taught by Professor Carlson,mischel,power during the Summer '07 term at Berkeley.

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