Biology 1001A Lecture Notes - Lecture 21: Polyploid, Allopatric Speciation, Disruptive Selection

• School: Western University
• Department: Biology
• Course: Biology 1001A
• Professor: Tom Haffie

Document Summary

On multiple choice exams, you should be able to identify . Which species concept (morphological, biological, phylogenetic) is being used, gi(cid:448)e(cid:374) (cid:858)real (cid:449)orld(cid:859) exa(cid:373)ples. Pe(cid:272)ies = (cid:862)a disti(cid:374)(cid:272)t (cid:272)luster i(cid:374) phe(cid:374)ot(cid:455)pi(cid:272) spa(cid:272)e, (cid:374)o(cid:374) o(cid:448)erlappi(cid:374)g (cid:449)ith other su(cid:272)h (cid:272)lusters(cid:863) things that look the same probably belong to the same species. Visually inspect organisms and determine what species there are. Limitations; populations cane be the same species but look completely different due to gene flow isolation. Biological species concept: reproductive isolation & shared gene pool. Pe(cid:272)ies = (cid:862)a(cid:374) interbreeding or potentially interbreeding group of i(cid:374)di(cid:448)iduals, reprodu(cid:272)ti(cid:448)el(cid:455) isolated fro(cid:373) other su(cid:272)h groups(cid:863) things that freely interbreed and produce fertile offspring belong to the same species. Not based on morphological characteristics but rather reproductive compatibility (willing to interbreed w each other and fitness of offspring) Lions and tigers belong to two different species even though they can produce offspring because many ligers are sterile ad tigers and lions do(cid:374)"t freel(cid:455) i(cid:374)ter(cid:271)reed u(cid:374)der natural conditions.