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1 markEcological Systems, Biodiversity and Conservations

CAPE Biology Unit 2 · 2003 · Paper 1 · Question 7(d)(iii)

A government imported genetically modified maize seeds containing Cauliflower Mosaic Virus DNA and herbicide resistance, distributed near indigenous maize varieties.

How can the original genotype of the indigenous maize be restored?

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  1. 7(a)Name the type of therapy mentioned in the passage and explain what effect it would have on the newborn baby.[2 marks]
  2. 7(b)A mother whose first child died of SCID asks during her second pregnancy to check the foetus. Name ONE method which the doctor could use to determine if the…[1 mark]
  3. 7(c)In SCID disorder, stem cells are isolated, genetically modified, and re-injected. Give ONE other method by which genetically modified genes can be introduced…[1 mark]
  4. 7(d)(i)Outline THREE ways in which the government can determine if the genetically modified maize has contaminated the indigenous maize.[4 marks]
  5. 7(d)(ii)If the indigenous maize has been contaminated by the genetically modified maize, deduce how the genotype could have been affected.[1 mark]

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