Quiz
L26 Population genetics: variation in space and time
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Questions in this quiz (7)
1Allele frequencies in a [blank_start]population[blank_end] remain [blank_start]constant[blank_end] over time unless acted upon by evolutionary [blank_start]forces[blank_end].
- Apopulation
- Bconstant
- Cforces
2Which of these is not an assumption of the Hardy-Weinberg equilibrium?
- ALarge population size
- BNo natural selection
- CNo mating
- DNo mutations
- ENo migration
3The frequency of alleles can be calculated by:
- Ap + q = 100
- Bp + q = 1
- Cp^2 + 2pq + q^2 = 1
- Dp^2 + pq + q^2 = 100
4The genotypic frequency can be calculated by:
- Ap^2 + pq + q^2 = 1
- Bpq^2 + 2pq + q^2 = 1
- Cp^2 + 2pq + q^2 = 1
- Dp1^2 + p + q = 1
51 in 2500 children are born with the recessive disease cystic fribrosis. What proportion of the population are carriers of this disease?
- A0.0004
- B0.02
- C0.98
- D0.0392
6Genetic drift is a change in allele [blank_start]frequencies[blank_end] due to random, [blank_start]non[blank_end] natural selection events.
- Afrequencies
- Bnon
7Stabilising selection [blank_start]reduces[blank_end] variation but [blank_start]doesn't[blank_end] change the mean. Directional selection [blank_start]changes[blank_end] the mean value toward an [blank_start]extreme[blank_end]. Disruptive selection [blank_start]favours[blank_end] the two extremes, and often leads to [blank_start]speciation[blank_end].
- Areduces
- Bincreases
- Cdoesn't
- Dextreme
- Echanges
- Ffavours
- Gspeciation
- Hextinction
Information
- Description
- • Calculate genotype frequencies using Hardy-Weinberg equilibrium. • Identify that random genetic drift occurs rapidly in small populations. • Explain how populations evolve over time in response to selection.
- Author
- Mer Scott
- Language
- English
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- 34
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