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2 marksCell Division and Genetics

CSEC Human and Social Biology · January 2010 · Paper 2 · Question 7(d)(ii)

Figure 5 shows a genetic diagram to represent sex inheritance in humans.

Use your answer to (d)(i) to explain why the number of males and females in a population is approximately the same.

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Other parts of this question

  1. 7(a)(i)State the meaning of the term 'genetic variation'.[1 mark]
  2. 7(a)(ii)State the meaning of the term 'environmental variation'.[1 mark]
  3. 7(b)What is the name of the chemical which forms a gene?[1 mark]
  4. 7(c)Suggest ONE benefit of genetic variation.[1 mark]
  5. 7(d)(i)Complete Figure 5 to show how sex (gender) is inherited in humans, showing parental genotypes, gametes, offspring genotypes, and offspring phenotypes.[4 marks]

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