Factors affecting evolution of species Flashcards

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1
Q

What is stabilising selection?

A

eliminates the extremes within a population

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2
Q

What is genetic drift?

A
  • Random change in the allele frequency of a population
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3
Q

What is founder effect?

A
  • the loss of genetic variation due to the establishment of a new ppulation
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4
Q

What is directional selection?

A
  • favours individuals at the extreme in a range of variation
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5
Q

What is genetic bottleneck?

A
  • a chance event causes a dramatic,reduction in the size of the population and gene pool.
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6
Q

What is speciation?

A
  • Evolution of a new species from an existing one
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