BIOL 2200 Lecture Notes - Lecture 4: Mendelian Inheritance, Adaptation, Heritability
24 Jan 2018
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Biol 2200- genetic variation and the hardy weinberg. Chapter 23: the evolution of populations cont (484-491) The hardy-weinberg equation can be used to test whether a population is evolving. Example: a ground finch population on the galapagos went from 1200 to 180. Researchers observed that the small seeds were limited and the finches had to resort to large hard seeds. This led to the birds with the deeper beaks to survive and the population evolved due to natural selection. Microevolution: a change in allele frequencies in a population over generations. Can be caused by natural selection, genetic drift, and gene flow. Genetic variation: difference amongst individuals in their dna composition. Many of the differences are from the introns (non coding dna) lying between the exons (coding dna) Formation of new alleles: can be a result of mutation, a change in the nucleotide in the dna.
