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6 marksGenetic Concepts

CSEC Biology · January 2020 · Paper 2 · Question 6(c)(i)

Persons with the inherited condition albinism do not produce the pigment (melanin) that gives the skin its dark colour.

Using the symbols A to represent a normal allele and a to represent the albino allele, draw a genetic diagram to illustrate how two heterozygous parents could produce an albino child.

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Other parts of this question

  1. 6(a)Describe how the human skin helps the body to keep cool on a hot, sunny day.[6 marks]
  2. 6(b)State ONE similarity and ONE difference between human beings and invertebrates in the ways they cool their bodies on hot days.[3 marks]
  3. 6(c)(ii)Identify the genotype of the albino child.[1 mark]
  4. 6(c)(iii)State the probability of the albino child being produced.[1 mark]

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