BIO220H1 Lecture Notes - Lecture 6: Atlantic Cod, Trophy Hunting, Directional Selection
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BIO220H1 Full Course Notes
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6 ecology and evolution of harvested populations ii. If larger than x, it is caught in the net. If smaller than x, it swims through the holes. Trophy ornaments: size of antler racks, size of horns in sheep. Continuous: phenotypes that vary continuously: quantitative traits, e. g. , size, mass, length, time to maturity, behaviour. Discrete qualitative categories: mendelian traits, e. g. , eye colour, blood groups. Quantitative traits: lots of genes, each gene has a very small individual effect on the phenotype, p = g + e + g*e: genetic traits, environmental traits and the interaction of. Discrete mendelian traits: cannot infer genotype of a given gene from a phenotype, examining frequency of individual snps or alleles will not predict phenotypic values, use statistical descriptions. Individuals with phenotypes above threshold die: those below threshold live. Intensity of this selection measured: difference in the mean of the population after the selection compared to before the selection, s = z* - z.
