Selection and changing allele frequencies Quiz
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5 questions, one answer each
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1. Which process creates new alleles?
- A. Crossing over in meiosis
- B. Mutation
- C. Random fertilisation
- D. Independent assortment
2. Selection against both extremes of a phenotype is called
- A. directional selection
- B. disruptive selection
- C. stabilising selection
- D. artificial selection
3. In a population of mice, those with darker fur are better camouflaged on dark soil and so survive more often. What happens to the allele for dark fur?
- A. Its frequency decreases
- B. It is changed into a different allele
- C. Its frequency stays the same
- D. Its frequency increases
4. Which statement about evolution is correct?
- A. Evolution is a change in the allele frequencies in a population
- B. Individuals evolve during their lifetime
- C. Evolution is caused only by mutation
- D. Evolution produces perfectly adapted organisms
5. A pest population becomes resistant to a pesticide. Which type of selection is most likely to have acted?
- A. Stabilising
- B. Directional
- C. Disruptive
- D. None, as selection cannot act on pests