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How can a gene pool be changed over time? (What processes are involved?…
How can a gene pool be changed over time?
What processes are involved?
Mutation
Natural Selection
Genetic drift
Processes that create change
Original population - gene pool all the variations in allele types
New gene pools that may result in groups that can't interbreed.
Speciation happens
What processes/events change gene pools
Mutations
Point
Can change a whole gene
Frame shifts
Block/ whole set of chromosomes
polyploidy
Instant speciation
Diploid
2 sets
Haploid
1 set
Natural selection
Nature/environment determining which genotypes are fit
Genetic drift
Least influential in changing allele frequencies
Random or chance changes in allele frequencies
Individuals do not evolve but populations do
Mutations don't happen because the population doesn't need them
Most mutations are not useful
In sexually reproductive species mutations are recessive