ARCH 131 Chapter Notes - Chapter 4 &5: Order Of Friars Minor Capuchin, Fetus, Melanocyte
30 May 2017
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Textbook notes - week 2 - chapter 4 and 5. 2017 exploring biological anthropoogy: the essentials: pearson 2nd custom. Chapter 4 - the forces of evolution and the formation of species. Demonstrating natural selection in the wild is not easy. It takes many generations & a great deal of tedious field research. We speak of the forces of evolution as those factors occurring in natural populations that cause change in gene frequencies over multiple generations. A change in the base on the dna molecule is point mutation. Larger-scale errors during replication can result in chromosomal mutations, when entire chunks of chromosomes are transposed w/one another. Directional selection = natural selection that drives evolutionary change by selecting for greater or lesser frequency of a given trait in a population] Stabilizing selection = selection maintains a certain phenotype by selecting against deviations from it pg 63. Gene flow = movement of genes between populations.
