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.
2 of 8
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.
3 of 8
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.
5 of 8
What is speciation?
The evolution of new species from existing species.
6 of 8
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.
8 of 8
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
Card 4
Front
On a distribution curve, how would the curve for directional selection change?
Back
Card 5
Front
On a distribution curve, how would the curve for stabilising selection change?
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