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Flashcards in 12+ Deck (9)
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1
Q

What is allopatric speciation?

A

Splitting of species due to geographical isolating mechanism

2
Q

What is parapatric speciation?

A

Separation occurs even in contiguous population

May be isolated because of inability to recognise mates

3
Q

What is sympatric speciation ?

A

Spontaneous isolation occurs

Common in plants

4
Q

What is the definition of genetic drift?

A

Stochastic fluctuations in allele frequencies due to random sampling in a finite population

5
Q

The fisher-muller hypothesis suggests what?

A

Sexs advantage is to combine beneficial mutations into the same genomes allowing selection to more efficiently operate on them

6
Q

What is increased reproductive output that is unlinked to variation in particular traits likely to result in?

A

Neutral evolution

7
Q

What is the reduction in genetic variation in a population deriving from small initial population known as ?

A

Founder effect

8
Q

Define strength of selection

A

The average trait value of successful breeders minus the population mean

9
Q

Which technique could not be used to estimate the heritability of a trait?

A

Phenotypic correlations