LIFESCI 2D03 Chapter Notes - Chapter 2: Heritability, St Day, Aviary
8 Feb 2016
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Chapter 2- evolution and the study of animal behavior. 2. 1 the dog breeds we see today and is called artificial selection. all dogs" breeds have descended from gray wolf (canis lupus) human breeders have selected individuals that possess certain traits for a particular breed called the breed standard. Differences in breed standards over time eventually led to ever-greater differences among. Charles darwin called a similar process that occurs naturally natural selection. Natural selection-> differential reproduction and survivorship among individuals within. N. s occurs because variation in traits among individuals. Darwin articulated three conditions required for evolution by natural selection: a pop: variation exists among individuals in a pop. In the traits they possess: individuals" different traits are, at least in part, heritable, traits confer differences in survivorship and reproduction, a measure we call. Traits that confer high fitness increase over time and while those that confer low fitness fitness. decline.
