BIS 2B Lecture Notes - Lecture 9: Kin Selection, Macroevolution, Inclusive Fitness

• School: UC-Davis
• Department: Biological Sciences
• Course: BIS 2B
• Professor: strauss,gerhart

Document Summary

Genotype: genetic makeup of an organism, alleles carried. Fitness: the contribution of a geno/pheno to subsequent generation relative to the contribut. Microevolution: changes in allele freq from on gen to another. Macroevolution: new species arises due to the accumulation of microevolution changes. Inf 3: traits that enhance survival will increase in freq over time. Stabilizing selection: individuals near mean have highest fitness, variation reduced, mean s. Directional selection: one extreme has the highest fitness. Disruptive selection: both extremes have higher fitness almost making two different popul. When there are more left, pre ontribution of other geno/pheno. Can"t have large insects like in the movies because there isn"t enough oxygen in the air to support them. Environmental change: what is great now may not be great later ean stays the same populations ft, prey develops defensive isn"t. Fitness of phenotype depends on its frequency in population. Lamprey-like fish have right or left mouth to eat prey.