O LevelBiologyCambridgeTopic Questions17. Inheritance17.1 Variation

Variation (Cambridge O Level Biology)

Topic Questions

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1
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Which of the following characteristics show discontinuous variation?

  • Length of a foot

  • Body mass

  • Tongue rolling

  • Height

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2
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Which of these phenotypes is affected by both environmental and genetic factors?

  • Tongue rolling

  • Blood group

  • Body mass

  • Sickle cell anaemia

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31 mark

Which human feature shows discontinuous variation?

  • blood group

  • hair colour 

  • height

  • foot length

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1
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The graph below shows the height of bean plants grown from 1000 bean seeds.

variation-graph

What type(s) of variation can be seen in the graph?

  • Discontinuous only

  • Continuous only

  • Neither continuous or discontinuous

  • Both continuous and discontinuous

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1
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A woman who has blood group A and a man who has blood group B have four children, each with a different blood group; A, B, AB and O.

What types of variation does this show?

  • Discontinuous and genetic

  • Continuous and genetic

  • Continuous, environmental and genetic

  • Discontinuous, environmental and genetic

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