PSYCH 3F03 Chapter Notes - Chapter 1: Selectin, Natural Selection

• School: McMaster University
• Department: Psychology
• Course: PSYCH 3F03
• Professor: David Feinberg

Document Summary

Understanding natural selection: essential concepts and common misconceptions. Origin of species by means of natural. Selectin (darwin) provided first detailed exposition of process + implications of natural selection. Some organisms (offspring + parents) are more similar to each other than unrelated members of the population. Darwin: (cid:858)a(cid:374)y (cid:448)ariatio(cid:374) (cid:449)hich is (cid:374)ot i(cid:374)herited is u(cid:374)i(cid:373)porta(cid:374)t for us(cid:859: was for(cid:272)ed to treat sour(cid:272)e of variatio(cid:374) a(cid:374)d (cid:373)e(cid:272)ha(cid:374)is(cid:373)s of i(cid:374)herita(cid:374)(cid:272)e as a (cid:858)(cid:271)la(cid:272)k (cid:271)o(cid:454)(cid:859) Success in the struggle for existence would not be determined by chance, but biased by some of the heritable differences that exist among organisms. Some individuals possess traits that make them slightly better suited to a particular environment and are more likely to survive. Probability of it being passed on to the next generation is non-random if it impacts survival and reproduction. 2 stop process: origin of variation by random mutation, non-random sorting of variation due to its effects on survival and reproduction.