Shared Flashcard Set

Details

Biology 101 Lab
Chapter 13, Mechanisms in Evolution: Genetic Drift & Natural Selection
13
Biology
Not Applicable
07/23/2010

Additional Biology Flashcards

 


 

Cards

Term
Population
Definition
members of a species living in one locale
Term
gene flow
Definition
the movement of alleles between population
Term
Gene pool
Definition
consist of all the members allele's at the various loci
Term
Mutations
Definition
(permanent change in a gene) contributes to natural selection because it brings about variations, some of which increase the adaptation of population members
Term
Nonrandom mating
Definition
mating that has accourred due to chance, and therefore has had human interferance
Term
Natural Selection:
Definition
the process by which members of a population become adapted to their enviroment
Term
What is the Hardy-Weinberg Law
Definition
genotype frequencies do not change in large populations from one generation to the next without the influence of an evolutionary agent, such as genetic drift
Term
Genetic Drift
Definition
changes in allelic frequencies of a gene thar are due soley to chance
Term
Bottleneck effect
Definition
when a majority of genotypes are prevented from participating in the production of the next generation die to extreme natural or human interferance
Term
Founder Effect
Definition
when a few individuals by chance found a colony, only a fraction of the total genetic diversity of the original pool is presented
Term
Stabilization selection
Definition
is when extreme phenotypes are eliminated and the average phenotype is conserved because the environment is constant
Term
Directional selection
Definition
favors an extreme phenotype because the environment is changing
Term
Disruptive selection
Definition
favors the selection of at leastt two extreme phenotypes over average phenotypes because the environment is mixed
Supporting users have an ad free experience!