ARCH 131 Lecture Notes - Lecture 3: Sickle-Cell Disease, Assortative Mating, Allele Frequency
17 Apr 2016
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Document Summary
Gene pool: all the diferent genes and their various expression (their allies) that exist in the dna of a populaion. This can refer to their enire geneic makeup or to the alleles found at speciic gene locaions. Phenotype: the observable features/traits of an individual: the physical expression of an individual"s genotype. A current deiniion of evoluion: a change in allele frequency in a populaion from one generaion to the next. Internal sources of variability in allele frequencies: the creaion of geneic variability in individuals upon which the evoluionary process can act: necessary for natural selecion to act, if no variability, cant adapt to new condiions = exinct. External factors that act upon the variability in allele frequencies: the process of evoluion: such as natural selecion. Sources of geneic variability upon which evoluion can act. For humans with 23 set of chromosomes: over 8. 3 mil possible versions for every gamete, 70 trillion possible individuals could result from one human maing.
