Hardy-Weinberg, Selection and Speciation

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What does the Hardy-Weinberg principle predict?
If the proportion of dominant and recessive alleles of any gene in the population remains the same from one generation to the next.
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Name the five conditions that must be met for the Hardy-Weinberg principle.
No mutations, no migration into or out of the population, no selection, random mating and a large population size.
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What are the two kinds of selection and how are they different?
Directional and Stabilising. Directional changes the characterisitics of the population where statbilising preserves the characteristics of the population.
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On a distribution curve, how would the curve for directional selection change?
It will move to the right.
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On a distribution curve, how would the curve for stabilising selection change?
The peak becomes higher and narrower.
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What is speciation?
The evolution of new species from existing species.
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Define geographical isolation and give four examples.
When a physical barrier prevents two populations from breeding with one another. Oceans, rivers, mountain ranges and deserts.
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How can geographical isolation of two populations lead to differences in their gene pools?
They may experience different environmental conditions & the phenotypes best suited to the conditions of that area are selected from each population. The alleles in each populatiion will change over generations and differ increasingly over time.
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Other cards in this set

Card 2

Front

Name the five conditions that must be met for the Hardy-Weinberg principle.

Back

No mutations, no migration into or out of the population, no selection, random mating and a large population size.

Card 3

Front

What are the two kinds of selection and how are they different?

Back

Preview of the front of card 3

Card 4

Front

On a distribution curve, how would the curve for directional selection change?

Back

Preview of the front of card 4

Card 5

Front

On a distribution curve, how would the curve for stabilising selection change?

Back

Preview of the front of card 5
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