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8 marksPatterns of Inheritance

CAPE Biology Unit 1 · 2006 · Paper 2 · Question 8(b)

Explain the operation of multiple alleles in the ABO Blood Grouping System in humans and use genetic diagrams to show how parents with A (mother) and B (father) blood types may produce a family with all four types of blood group represented in the children.

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Other parts of this question

  1. 8(a)(i)What is meant by the term 'Gene'?[2 marks]
  2. 8(a)(ii)What is meant by the term 'Allele'?[2 marks]
  3. 8(c)(i)What are sex chromosomes and how do they control the inheritance of sex?[4 marks]
  4. 8(c)(ii)With the aid of a genetic diagram, explain sex linkage, showing how it is possible for a normal sighted woman and a normal sighted man to have colour-blind…[6 marks]

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