BLG 144 Lecture Notes - Lecture 1: Wide-Body Aircraft, Sickle-Cell Disease, Genetic Correlation

• School: Ryerson University
• Department: Biology
• Course: BLG 144
• Professor: Andrew Laursen

Document Summary

Lion only shares food with its pride only increasing the fitness of their pride: altruistic behaviour only increasing the fitness of their family members not sharing food with members of. Strong selection for larger beaks to break big seeds however the big beaks are more brittle (break easier) counter act that work against the trait: e(cid:454). I(cid:272)kle cell a(cid:374)e(cid:373)ia has a (cid:373)utated (cid:862)s(cid:863) ge(cid:374)e that leads to he(cid:373)oglo(cid:271)i(cid:374) to aggregate abnormally inside the cell reduced oxygen but resistant against malaria: genetic correlation occurs because of pleiotropy, in which single allele affects multiple traits. Peacock colourful appearance good for mating but harmful for survival (predation: ex. Frog mating call success but harmful as bats can locate sound to find frog and eat it: ex. Cheetah has longer legs for greater speed but more fragile bones: historical constraints, natural selection can only work with what it has in front of it, ex.