BIOL 3750 Lecture Notes - Lecture 6: Cyclic Adenosine Monophosphate, Montane Vole, Prairie Vole
27 Mar 2017
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Document Summary
Heritability is a statistical measure of the extent to which a trait is influenced by genes and ranges from. 0 indicates no genetic influence, and 1 indicates complete genetic influence. By holding the environment constant, observed variation must be the result of genetic variability. This is selective mating of closely related individuals, which reduces heterozygosity each generation (after 1 generation 25% is lost, after 20 generations 98% is lost). The genetic similarity allows for the testing of genetic effects by comparing 2 different inbred lines, raised in identical environments and recording differences in behaviour. This technique is a unique way to hold all extraneous variables constant. An example is the paradise fish where two strains were inbred for more than 30 generations and raised in identical environments. One inbred line maintained the original predator detection behaviour in response to their eyes (evokes a fleeing response).
