ARCL 140 Lecture Notes - Lecture 7: Frostbite, Pastoralism, Homeostasis
4 Feb 2017
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Document Summary
Phenotypic traits: expressed physically, observable, genotypic traits are the set of alleles that are ultimately responsible for the expression of phenotypic traits. Blood type - more than one phenotypic trait that is expressed. Frequency of alleles, genotypes and phenotypes in populations. Population: group of individuals who breed with each other and share a common gene pool. Hardy-weinberg equilibrium equation - measures genetic stability of population where there is no change in allele frequencies. The ideal population of the hw equilibrium equation. Mutation is not occurring within the pop. All members of the pop. are breeding. Everyone produces the same number of offspring. No migration in or out of the pop. For pair of alleles a and a. P2 = frequency of homozygous dom genotype. Q2 - frequency of homozygous recessive genotype. Short - term adaptations - tan, elevation. Photoprotective - darker pigmented skin tone absorbs less uv radiation.
