BIOB51H3 Lecture Notes - Lecture 17: R.W.D. Molenbeek, Twin Study, Probability Distribution
14 Dec 2012
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Document Summary
Before we made a simplification that phenotypes fall into discrete categories, determined strictly by genotypes. However, it is not so simple there is not a one to one ratio of gene to phenotype. Because of transcription from genotype to phenotype into protein. This is also affected by biotic and abiotic factors. Quantitative traits are characteristics for which phenotypes show continuous variation among individuals (eg: the endless possibility of height) These traits are typically determined by the environment and genes working together to form phenotypes. We will focus on the product of phenotype and heritability. Statistical properties of population traits such as mean and variance. Separate the idea of phenotype and heritibility from the genetic basis of the trait. They took plants of a range of known genotypes and cloned then and reared then in different environments (elevations in a mountain) Image: plants clones of genotype 4 reared at high elevation, medium elevation, and low elevation.
