Evolution

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  • Created by: rainbows
  • Created on: 15-03-17 14:46
What is a gene pool?
The complete range of alleles present in a population.
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How are new alleles usually generated?
By mutations in genes.
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What is allele frequency?
How often an allele occurs in a population.
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What is evolution?
A change in allele frequency.
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1st stage of natural selection?
Individuals within a population vary because they have different alleles.
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2nd stage of natural selection?
Selection pressures create a struggle for survival.
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3rd stage of natural selection?
Some individuals are better adapted to selection pressures than others.
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4th stage of natural selection?
Individuals with an advantageous allele are more likely to survive, reproduce and pass on advantageous alleles than individuals with different alleles.
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5th stage of natural selection?
This means that a greater proportion of the next generation inherit the advantageous allele.
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Other cards in this set

Card 2

Front

How are new alleles usually generated?

Back

By mutations in genes.

Card 3

Front

What is allele frequency?

Back

Preview of the front of card 3

Card 4

Front

What is evolution?

Back

Preview of the front of card 4

Card 5

Front

1st stage of natural selection?

Back

Preview of the front of card 5
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