BLG 10A/B Lecture Notes - Lecture 5: Coevolution, Bipedalism, Thumb
26 Oct 2015
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Variations are seen in traits such as skin, hair, fur, colour, size, ower blooming times. Brought by random mutation, permanent change in chemical structure of gene. Alleles of genes are not changed when inherited, simply distinct and separate. Organisms produce more offspring than will survive. Slow-breeding animals can produce large populations (ie turtles) Heritable traits that increase an individual"s survival rates and reproduction in an environment. Ie. different colour of ower affects # of pollinators. Favourable inherited variations tend to increase in frequency. End result: change in traits of individuals in a population over time. Genes that cause advantageous phenotypes are selected for. Humans use animal / plant breeding to selectively develop favourable traits by choosing certain animals to develop particular traits. 2 different purebreds breeding > hybrid / crossbred. Darwin proposed that nature determines which individual in a population is more t. Tness: genetic contribution of an individual compared to other individuals or organism"s bipedal)
