BIOL 2050 Lecture Notes - Phenotypic Trait, Quantitative Genetics, Mendelian Inheritance
Document Summary
Quantitative genetics- the branch of evolutionary biology that provides tools for analyzing the evolution of. 9. 1- the nature of quantitative traits: qualitative traits- characteristics that we can assign to individuals by just looking at them, or perhaps by conducting a simple genetic test. Traits with discrete phenotypes are special examples; most traits in most organisms show continuous variation: such as height, athletic ability, and intelligence, also beak length in soapberry bugs and bill depth in medium ground finches. Traits with continuous variation cannot assign individuals to discrete phenotypic categories by simple inspection: measurements must be taken, characters with continuously distributed phenotypes are called quantitative traits. Are determined by the combined influence of: genotype at many different loci, & the environment, quantitative traits are traits for which the distribution of phenotypes is continuous rather than discrete, quantitative traits are consistent with mendelian genetics. They are influenced by the combined effects of the genotype at many loci.
