Examples of Genetic Drift Gene Flow Selection Founder

Examples of Genetic Drift, Gene Flow & Selection

Founder Effect Bottle Neck Effect � When � Sudden a few individuals become isolated from large population establishing a new population. � The new population’s gene pool differs from the original Genetic Drift – change in environment drastically reduces the size of a population � By chance alone alleles represented are different from the original population nonselective & random

http: //evolution. berkeley. edu/evosite/evo 101/IIID 3 Bottlenecks. shtml Northern Elephant Seal

http: //islander 01. weebly. com/ http: /www. color-blindness. com/2011/11/14/livingwith-total-color-blindness-documentary-island-ofthe-colorblind// http: //curiositychronicles. tumblr. com/post/6108866789 /curious-about-achromatopsia Achromatopsia – Pingelap Atol

http: //www. sorensonvrs. com/aware 2012_pres erving Jonathan Lambert, 1694 http: //historytrendsanddeafeducation. pbworks. com/w/page/1857064 5/Martha's%20 Vineyard Deafness on Martha’s Vineyard

http: //nell-rose. hubpages. com/hub/Polydactyly-The-curious-Congenital-Anomaly-found-In-Humans Polydactyly in Amish

http: //anthro. palomar. edu/synthetic/synth_5. htm Type O blood in American Indians

�The transfer of alleles into or out of a population due to the movement of fertile individuals or their gametes Gene Flow

http: //bch. cbd. int/cpb_art 15/training/module 3. shtml Gene Flow in Plants

http: //www. bbc. com/news/magazine-27159697 “Thousands of children were fathered by American Servicemen during the Vietnam war. ” Gene Flow in Humans

http: //www. sciencedaily. com/releases/2011/05/110525131711. htm Gene Flow between Animals

�Consistently increasing the frequency of alleles that provide reproductive advantage and thus lead to adaptive evolution Selection

https: //darwinbookcats. wordpress. com/2011/06/22/stabilizing-selection-and-a-stableenvironment/ Stabilizing Selection

http: //legacy. hopkinsville. kctcs. edu/instructors/Jason-Arnold/VLI/Module%203/Module 3 Evolution 8. html Directional Selection

https: //www. studyblue. com/notes/note/n/test-1 -set-8 -evolutionary-processes/deck/1100896 Disruptive Selection

Intersexual (mate choice) Intrasexual (competition) http: //www. zoology. ubc. ca/~otto/Pop. Gen 500/ Discussion 3/Overheads. html Sexual Selection http: //wallace. genetics. uga. edu/groups/evol 3000/wik i/543 e 6/Sexual_Selection. Conflict. html

Heterozygote Advantage http: //biologyforums. com/index. php? action=gallery; sa=view; id=696 Frequency-Dependent Selection http: //bio. research. ucsc. edu/~barrylab/classes/ev olution/NS_H 2. HTM Balancing Selection