BIO 3122 Lecture Notes - Lecture 12: Gestational Diabetes, Natural Disaster, Gestational Age

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Gxe interactions: phenotype plasticity in c. elegans: plasticity of temperature phenotype, plasticity at diff temps in diff indivs of same genotype maturing at diff ages (panel a) Key concepts: differences in phenotype plasticity may be heritable and can therefore evolve. (fig 7. 22) What are it"s uses i(cid:374) the stud(cid:455) of evolutio(cid:374): describe three main modes of selection and their impacts on the frequency and variation in population traits. Peter and rosemary grant studying finches on daphne major. Diversity in darwin"s finches: thought to arrived at galapagos 12mya, thought to evolve into 13 diff species. Finches specialized in feeding, living in cactuses: birds using twigs as tools to get bugs, eat ticks from iguanas, one sucks blood. Beak size of evolution: measured width and depth of beak, drought resulted in more hard, woody seeds. Favored larger beaked birds: adaptation: trait that has evolved via natural selection.