Quelpr
2 marksCell Division and Genetics

CSEC Human and Social Biology · January 2014 · Paper 2 · Question 6(b)

Explain how the chromosome number of an individual with Down's syndrome differs from that of a normal person.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 6(a)Distinguish between continuous and discontinuous variation, and give ONE example of EACH type.[4 marks]
  2. 6(c)Use a Punnett square to determine the genotypes of the offspring from a cross between a female carrier of red-green colour blindness (X^R X^r) and a normal…[6 marks]
  3. 6(d)(i)Suggest the possible type of pollution resulting from cell phone towers erected close to residential homes.[1 mark]
  4. 6(d)(ii)Suggest a possible adverse effect of this pollution on humans.[1 mark]
  5. 6(d)(iii)Suggest an action humans could take to reduce the impact of this pollution.[1 mark]

More practice: the rest of this paper · more Cell Division and Genetics questions · all CSEC Human and Social Biology past papers