BIO120H1 Lecture Notes - Lecture 5: Genetic Drift, Ecological Genetics, Selective Breeding
36
BIO120H1 Full Course Notes
Verified Note
36 documents
Document Summary
Bio120: the maintenance and measurement of genetic variation (lecture 5) Fisher: through natural selection, the speed of evolution depends on the speed of genetic variation. Challenging: 20 000 different genes, want to know which proportion of genes are variable. Can do this by measuring polymorphism and the fraction of variable genes. Have to know about the genes that are not variable. All hated one another (haldane was a communist, wright believed in random processes) 1930-1950: theoretical population genetics was initiated by fisher, haldane, and wright, and provided the foundations for neo-darwinism and the new synthesis . Neo-darwinism: merging of darwinian ideas with genetics, harmonization of population genetics with darwinian natural selection. They showed that continuous variation and darwinian natural selection were entirely consistent with mendel"s laws. Brought mendel"s laws into our idea of natural selection. Darwin thought that inheritance was blending (intermediate phenotype): works for certain continuous traits, but doesn"t work for mendel"s laws.
