evolution Flashcards

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1
Q

4 proceses for evolutionary change

A

1-genetic drift
2-mutation
3-genetic flow (migration)
4- natural selection

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2
Q

3 sources for genetic variation

A

1-reproduction (genetic shuffling-crossing over)
2-mutations
3-gene flow

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3
Q

what can be the results of a mutation

A

neutral
harmful
beneficial

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4
Q

what can acause a mutation

A

1-Dna fails to copy sccurately
2-external influences
like chemicals and radiation

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5
Q

whats gene flow

A

the movement of genes from one population to the next

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6
Q

what is genetic drift

A

an event randomly kills off some of the population and changes the allelic frquency

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7
Q

what is natural selection

A

where on organism is better adapted to their environment and suvive to pass dfown their genes

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8
Q

in “survival of the fittest” what does fitness mean

A

ability of a genotype to leave offspring in the next generation

  • ability to survive
  • ability to find a mate
  • ability to reproduce
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