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Lecture Week Two

Lecture Week Two - Anthropology 200 Week Two Cell Division...

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Anthropology 200 Week Two: Cell Division and the Role of Chromosomes in Inheritance September 4, 2008 Email Dr. Janice Schafrik at [email protected] for Note-taking job: receive 100 dollars on USC discretionary account I. Evolutionary Rates a. Evidence for “fast” evolution i. Artificial selection (e.g. domestic breeding) 1. Witnessed great variations and diversity in domestic breeds ii. Reproductive physiology (e.g. Poeciliopsis) 1. The way in which the adult females pass on nutrients to their young varies a. Through the egg b. Placenta: continuous transmission of nutrients c. Looking at their history, these two different groups of minnows have diverged over a million generations (which is quick on the grand scale of things) iii. Theoretical modeling (e.g. simulations) 1. One can set up some conditions 2. Can be a very fast process b. Contrast with fossil record c. Rates of evolution can vary with each organism d. Mosaic Evolution i. There have been changes in different systems within organisms that have been changing at different rates over time e. Challenges that Darwin faced: i. Resistance to the idea of evolution and natural selection
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