What is allopatric speciation?
Splitting of species due to geographical isolating mechanism
What is parapatric speciation?
Separation occurs even in contiguous population
May be isolated because of inability to recognise mates
What is sympatric speciation ?
Spontaneous isolation occurs
Common in plants
What is the definition of genetic drift?
Stochastic fluctuations in allele frequencies due to random sampling in a finite population
The fisher-muller hypothesis suggests what?
Sexs advantage is to combine beneficial mutations into the same genomes allowing selection to more efficiently operate on them
What is increased reproductive output that is unlinked to variation in particular traits likely to result in?
Neutral evolution
What is the reduction in genetic variation in a population deriving from small initial population known as ?
Founder effect
Define strength of selection
The average trait value of successful breeders minus the population mean
Which technique could not be used to estimate the heritability of a trait?
Phenotypic correlations