ARCH 131 Lecture Notes - Allele Frequency, Genetic Variability, Unit

• School: Simon Fraser University
• Department: Archaeology
• Course: ARCH 131
• Professor: Dennis Sandgathe

Document Summary

First of all, before we get into this next lecture, there are several more important terms for us to understand: (cid:120) a population, in the evolutionary sense, refers to a group of interbreeding organisms. These are all the different traits that the offspring of members of a population have the chance of inheriting. A genotype is the underlying genetic makeup of an individual. We can think of genotype as the genes of an organism and its. Let"s now look at sources of genetic variability. Remember, natural selection only acts on variability that already exists in the genetic makeup of individuals. Here we"ll examine where that variability comes from. It may help to imagine all the various alleles carried by the members of a breeding population as all the available ingredients from which each individual within that group can be constructed. In each subsequent generation there is a slight change in the quantities, arrangement and combination of these ingredients the alleles.