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1 markGenetic Variation and Speciation

CSEC Biology · May/June 2005 · Paper 2 · Question 5(a)(iii)

Figure 6 shows the inheritance of earlobe size in a human family.

Give ONE reason for the importance of variation among living things.

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Other parts of this question

  1. 5(a)(i)Using the chart in Figure 6 above, state the genotypes of family members, 1, 2 and 6.[3 marks]
  2. 5(a)(ii)Identify the type of variation involved in the inheritance of earlobe size in humans shown in Figure 6 above.[1 mark]
  3. 5(b)Account for the fact that in the ABO system, although there are FOUR different blood groups in existence, only THREE alleles determine these blood groups.[3 marks]
  4. 5(c)Name ONE inherited disease.[1 mark]
  5. 5(d)How do the treatment and control of an inherited disease differ from the treatment and control of a deficiency disease?[4 marks]

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