Gene Pool Change

Question 1

what is microevolution
-what 5 thingd can result in allele frequency changes

Answer 1

-gradual change in allele frquencies
-mutations
-gene flow
-non random mating
-genetic drift
-natural selection

Question 2

1. Mutations
   -what are they
   -may be (3)
   ______ ________ will sometimes prefer a mutation

Answer 2

-changes in DNA
-advantageous, neutural, bad
-natural selection

Question 3

2. Gene Flow
   -describes what?
   -what can it increase but also decrease?

Answer 3

-net movement of alleles from one pop to another due to migration
-increase geentic diversity in a population, but also decrease it

Question 4

3. Non Random mating
   -selecting a mate based on what?

Answer 4

-physical appearance or behaviour

Question 5

4. Genetic Drift
   -occurs in what kind of populations? what is it?
   -what 2 types are there

Answer 5

-small. change in allele frequencies from chance events
1. the founder effect: gene pool changes when a few individuals move to a new isolated populations
2. the bottleneck effect: change in gene pool happens from a fast decrease in population, leading to exstinction

Question 6

5. Natural Selection
   -what is it

Answer 6

-those who are better able to survie and repro will pass on their traits

Question 7

What is speciation
-why are speciation and evolution not the same
-what are the 2 mechanisms of speciation

Answer 7

-formation of new species
-natural selection can lead to evolution without speciation occuring
-geographic isolation and reproductive isolation

Question 8

1. geographic isolated
   -what is it
   -what happens to gene flow
   -what happens to the groups
2. reproductive isolation
   -can be caused by what
   -what is it

Answer 8

-seperation with barriers
-stops
-genes become different and 2 diff species are formed

-geographic isolation
-organisms in the population cant mate even after barriers are removed