BIOL 112 Study Guide - Midterm Guide: Allopatric Speciation, Gene Flow, Cambrian Explosion

• School: Texas A&M University
• Department: Biology
• Course: BIOL 112
• Professor: Lee Christopher

Document Summary

Gene flo(cid:449) (cid:449)o(cid:374)"t (cid:894)fo(cid:396) the (cid:373)ost pa(cid:396)t(cid:895) dec ge(cid:374)eti(cid:272) di(cid:448)e(cid:396)sit(cid:455: > migration = > genetic diversity interrupting gene flow speciation, his list of sources of genetic diversity has 12 things on it right now. One can go up while others go down; not linked to each other explicitly. We live on an unstable rock things change/are changing. 22: (cid:271)egi(cid:374)(cid:374)i(cid:374)g=(cid:448)e(cid:396)(cid:455) i(cid:373)po(cid:396)ta(cid:374)t, (cid:271)ut (cid:374)ot a to(cid:374) of (cid:395)"s, reference to darwin but no dates and everything. Get a lot of interrupted gene flow, allopatric speciation (even on same island) Small set of genetics that just shows up and stays=founder effect (as long as most live-some might die) Geological isolation (natural divide) b/w 2 different bird groups. Bc of lack of gene flow and allopatric speciation, you have a better chance to take 1 bird from 1 island to interbreed w/bird from othe(cid:396) isla(cid:374)d a(cid:374)d the(cid:455) (cid:449)o(cid:374)"t.