ARCH 131 Lecture Notes - Lecture 5: Allele Frequency, Assortative Mating, Meiosis
17 Nov 2016
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Document Summary
Gene pool: all the different genes and their various expressions (their alleles) that exist in the dna of a population. This can refer to their entire genetic makeup or to the alleles found at specific gene locations. Phenotype: the observable features/traits of an individual: the physical expression. A current definition of evolution: a change in allele frequency in a population from one generation to the next. Sources of genetic variability and the evolutionary process. 2 major sources for changes in frequencies, combinations and new alleles. 1. 1 recombination: does not result in new alleles only changes: random assortment of chromosomes: during meiosis these pairs line up in different random combinations in every sex cell every time they divide. The line of chromosome pairs separate into 2 daughter cells. Each daughter cell will get either fathers or mothers version of each chromosome.
