CAS BI 107 Lecture Notes - Lecture 3: Microevolution, Gene Duplication, Wisdom Tooth
30 Sep 2016
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Document Summary
Modularity allows for the expression of developmental control genes in different amounts, at different times, and in different locations of the embryo: heterometry--a difference in the amount of a gene produced ex. Finch balls: heterochrony difference in the timing of a gene expression during development ex. Giraffes neck: heterotopy difference in spatial pattern of gene expression during development ex. Importance of darwin"s concept of evolution is that no other scientific idea has so radically altered our understanding of ourselves. Fossil record began 3. 8 bil years ago documents the course of life through time. When fossils are arrayed in order of age, a progress change is visible transitional fossils intermediate fossils that show how a species evoved: 2. Molecular record further removed fossils are, the more different their dna structure. Cytochrom c essential component of election transport chain (highly conserved) Chromosomes count supports evolution because primates have 24 and humans 23, but in humans, 2 chromosome combined to one (chromosome 2)
