Bio Cards Ch23.txt
Card Set Information
Bio Cards Ch23.txt
What is Micro Evolution?
* Evolution�s Smallest Scale
* Change in Allele Frequency in a Population over Generations
What are Three Main Causes That Change Allele Frequency?
* Natural Selection
* Genetic Drift- Chance Events
* Gene Flow
What is Gene Flow?
-Transfer of Alleles Between Populations
Gene Variability can be Quantified as�
-The Avg Heterozygosity
-The Avg Percent of loci that are Heterozygous
-Gradient Change in a Character Along a Geographic Axis
* Ultimate Source for New Allele
* A Change in the Nucleotide Sequence of an Organisms DNA
Mutation in Plants and Fungi are �
-More Likely to Occur in Cell Lines That Produce Gametes, Allowing them to be Passed On
Mutation in Animals
-Most Are Lost When The Individual Dies
New Mutation That Alter PHnotype are Usually�
Point Mutations______cause any change.
Hardy Weinberg Equilibrium
-Principle Frequency of alleles and genotypes in a population will remain constant from generation to generation provided that Mundelein segregation and recombination of alleles are at work.
Required for Hardy-Weinberg Equilibrium
* No Mutation
* Random Mating
* No Natural Selection
* Extremely Large Population
* No Gene Flow
When a few individuals become isolated from a large population, this smaller group may establish a new population whose gene pool differs from the source population.
Sudden Change in Environment Drastically Reduces Size of Population
Due to Frequency, ______________ is More Likely Than ______________ to Alter Allele Frequency Directly.
Gene Flow, Mutation
One�s Strength and Health is an ______________ Which Can Lead to Greater Relative Fitness.
The Contribution an Individual Makes to The Gene Pool of the Next Generation Relative to The Contribution of Other Individuals
Disruptive Selection Favors�?
Stabalizing Selection Favors�?