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6.2 Variation and evolution

6.2 Variation and evolution

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Question 12
F

A dog breeder repeatedly mates closely related dogs with a gentle nature. After several generations, inherited defects become more common.

Which change would best maintain selection for a gentle nature while reducing the risk associated with inbreeding?

[1]
A

Mate gentle dogs with unrelated gentle dogs, then select gentle offspring for further breeding.

B

Mate gentle dogs with closely related dogs, then select gentle offspring for further breeding.

C

Mate aggressive dogs with unrelated aggressive dogs, then select aggressive offspring for further breeding.

D

Mate aggressive dogs with closely related dogs, then select aggressive offspring for further breeding.

Markscheme

6.2 Variation and evolution Questions

  1. GCSE
  2. /Biology
  3. /6.2 Variation and evolution

44 exam-style questions on AQA GCSE Biology 6.2 Variation and evolution, covering 6.2.1 Variation, 6.2.2 Evolution, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, and 6.2.5 Cloning. Each one has a worked solution and a mark scheme showing where the marks go.

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