ANT 101 Lecture Notes - Lecture 14: Microevolution, Hemoglobin, Mutation
Document Summary
Only inherited traits can be selected for" or against". Selection can only work with preexisting variation. Fitness is relative to the environment and to organisms. They become better fit within their environment. To have a good fitness you must have more babies then that of your species. Selection can only act on traits that influence reproduction. Hb^a = codes for normal form of hemoglobin (protein) Being homozygous for hb^s lowers life expectancy. Where environments where malaria is common, heterozygous have greater reproductive success than those without the hbs allele. You are resistant to malaria with heterozygous. Which of the four forces produce variation. Which of the four forces redistributes variation. Which of the four forces act on variation. Sometimes the four evolutionary forces act together. Mating is random if all this is met there is no evolution occurring. Changes in allele frequencies within population of species.
