PSYO 2160 Chapter Notes - Chapter 2: Border Collie, Show Dog, Selective Breeding

• School: Dalhousie University
• Department: Psychology
• Course: PSYO 2160
• Professor: Reeve Cathrine

Document Summary

Artificial selection of dog traits: selectively breeding animals based on a desirable phenotype, phenotype: observable properties of an organism, show dog vs. Working dogs: ger(cid:373)a(cid:374) hepard"s ha(cid:448)e (cid:272)ha(cid:374)ged i(cid:374) the (cid:449)a(cid:455) the(cid:455) use to look for the traits we want through artificial selection, border collies are selected based on their behaviour. Breeding for a specific phenotype can causes a change in their genes: humans are the selective agent. Important notes: ge(cid:374)ot(cid:455)pe phe(cid:374)ot(cid:455)pe, genotype does not automatically determine a phenotype, environment, what your genome is at birth, can change due to the environment, learning, culture. Natural selection: charles darwin, nature is the selective agent. Instead of humans being the selective agent now nature is. Traits increase/decrease in frequency depending how well they help organism survive in their current environment: those that survive, reproduce, natural selection is not always linked to survival of the fittest. It is not enough just to survive; you also have to reproduce to carry on your genes.