Biology 2581B Lecture Notes - Lecture 15: Macronucleus, Algae, Transfer Rna
22 Apr 2017
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Document Summary
Consider two populations of woolly mammoths, one whose genome took 45 000 years for extinction, the other"s only took 4300 years: the 45 000 extinct population is on the mainland, the other population on a small island. The sample size of the island population is much smaller than the mainland population. When mutations enter a big population, they behave differently than when mutations enter a small population. Mutations are rarely beneficial, so in this situation let"s assume that they"re bad mutations. In a big population, if the mutation doesn"t kill the individual, it makes the individual less fit: hard for you to survive because there"s a lot of competition around you (you"re not cool but everyone else is) In a small population, if the mutation doesn"t kill you, you"re still less fit, but there"s less competition because there"s not that many other individuals around you.
