Gene pools + evolution
Gene pools
What is a gene pool?
all the genes and their alleles present in a population
What is genetic drift?
change in allele frequencies in a geographically isolated population
What increases likelihood of genetic drift?
smaller populations
The 2 ways genetic drift can happen:
What is the bottleneck effect?
major event decreases the population
only some individuals survive (like some falling through a bottleneck)
variation of alleles in population likely limited
What is the founder effect?
small proportion of initial population move/ isolated to new location
likely to limit alleles in gene pool
How did neo-Darwinism arise?
work of Darwin built on by Mendel, McClintock
genetics integrated with natural selection
Key features of neo-Darwinism
mutation is the source of all genetic variation
evolution is when the genetic composition of a gene pool in a population
changes
phenotype is mainly a product of the genotype
Gene pools + evolution 1
Gene pools
What is a gene pool?
all the genes and their alleles present in a population
What is genetic drift?
change in allele frequencies in a geographically isolated population
What increases likelihood of genetic drift?
smaller populations
The 2 ways genetic drift can happen:
What is the bottleneck effect?
major event decreases the population
only some individuals survive (like some falling through a bottleneck)
variation of alleles in population likely limited
What is the founder effect?
small proportion of initial population move/ isolated to new location
likely to limit alleles in gene pool
How did neo-Darwinism arise?
work of Darwin built on by Mendel, McClintock
genetics integrated with natural selection
Key features of neo-Darwinism
mutation is the source of all genetic variation
evolution is when the genetic composition of a gene pool in a population
changes
phenotype is mainly a product of the genotype
Gene pools + evolution 1
