Chapter 8 Evolution & Natural Selection flashcards _ Quizlet

Also th en u mb ero ffertile o ffsp rin g itrep ro d

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Unformatted text preview: ro d u ctiv e o u tp u t o f in d iv id u als with altern ativ e p h en o ty p es. Also th e n u mb er o f fertile o ffsp rin g it rep ro d u ces. Fo u n d er effect A p h en o men o n b y wh ich g en etic d rift can o ccu r; th e iso latio n o f a small su b g ro u p o f a larg er p o p u latio n wh ich can lead to ch an g es in th e allele freq u en cies o f a p o p u latio n b ecau se all th e d escen d an ts o f th e smaller g ro u p will reflect th e allele freq u en cies o f th e su b g ro u p , wh ich may b e d ifferen t fro m th o se o f th e larg er so u rce p o p u latio n . (1 0 % o f an islan d p o p u latio n is b ald . After g en eratio n s, a majo rity o f th e p o p u latio n is n o w b ald ) Gen e flo w A ran d o m ch an g e in allele freq u en cies o v er su ccessiv e g en eratio n s, a cau se o f ev o lu tio n . Natu ral Selectio n A mech an ism o f ev o lu tio n th at o ccu rs wh en th ere is h eritab le v ariatio n fo r a trait an d in d iv id u als wh ich o n e v ersio n o f th e trait h av e g reater rep ro d u ctiv e su ccess th an in d iv id...
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This document was uploaded on 02/25/2014.

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