BIOL 304 Lecture Notes - Lecture 28: Reaction Norm, Cambrian Explosion, Polypterus

• School: McGill University
• Department: Biology
• Course: BIOL 304
• Professor: Graham Bell

Document Summary

Same format as midterm definitions, short answer, essay questions. E(cid:454): if it sa(cid:455)s (cid:862)dis(cid:272)uss a(cid:374)d gi(cid:448)e e(cid:454)a(cid:373)ples(cid:863) (cid:455)ou ha(cid:448)e to do (cid:271)oth to get full marks! Note: nomenclature for writing scientific names; for taxonomical names, underline when writing by hand/italicize in typed. Epigenetic evolution: methylation marks translates across generations, e(cid:448)e(cid:374)ts that happe(cid:374) i(cid:374) a (cid:373)othe(cid:396)(cid:859)s life (cid:272)a(cid:374) t(cid:396)a(cid:374)slate into the genome of her children. Differences between lamarck and darwin: co(cid:373)pa(cid:396)ed ideas o(cid:374) gi(cid:396)affe(cid:859)s (cid:374)e(cid:272)k. Developmental hierarchy: simple to complex phenotype over developmental time. Less canalized -> genome has little effect on phenome, lots of variation. Canalisation: can be considered a buffering of developmental pathways such that minor mutations would not greatly affect the course of development. Ionic changes can cause proteins to interact more closely: epigenetic (environmental variation) adhesion allows genotype to become selected upon to stabilize the stickiness phenotype in different environments.