BS 148H Lecture 3 - o Ex) height Heritability The slope of...

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BS 148H Lecture 3: Microevolution 2 16:31 Note: *Review slides and lecture notes before class, be familiar with specific  studies illustrated in lecture* Microevolution 2 An organism exposes its phenotype not its genotype to the environment Penotypic selection within a generation requires phenotypic variation within  the population Genetic response across generations (evolution of population) requires: a  correlation between genotypes and phenotypes – heritability  Heritability is an estimate of the proportion of phenotypic variation in the  population that results from different genes rather than different environmental  effects Phenotypic variation Within populations is ubiquitous especially for continuous (quantitative) traits
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Unformatted text preview: o Ex) height Heritability The slope of the linear regression line is one way to estimate heritability Called regression because offspring are rarely as deviant as their parents their parents; they regress toward the mean Can predict evolution in the short term if selection and heritability are known but cant predict it in the long run due to unpredictable variables Expression of genes depends on the environment Having an allele versus expressing an allele Environment determines what alleles are expressed (transcribed) just because you have an allele doesnt necessarily mean it is expressed 16:31 16:31...
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This note was uploaded on 11/11/2010 for the course BS 158H taught by Professor Elzinga during the Fall '08 term at Michigan State University.

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BS 148H Lecture 3 - o Ex) height Heritability The slope of...

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