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1 markCell Division and Genetics

CSEC Human and Social Biology · May/June 2013 · Paper 2 · Question 4(b)(i)

State the name of the event during meiosis in which there is the exchange of small parts of DNA between homologous chromosomes.

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  1. 4(a)(i)State which type of cell division results in identical offspring.[1 mark]
  2. 4(a)(ii)State the number of chromosomes that will be found in the daughter cells of mitosis.[1 mark]
  3. 4(a)(iii)In which type of cell does mitosis take place?[1 mark]
  4. 4(b)(ii)State the source of the homologous chromosomes and the importance of the event named in (b)(i).[2 marks]
  5. 4(c)(i)Describe the changes occurring in the menstrual cycle from Day 0 – Day 5 and Day 6 – Day 14.[4 marks]
  6. 4(c)(ii)Describe the changes that take place with progesterone levels AFTER ovulation, if pregnancy occurs, and if pregnancy does NOT occur.[3 marks]
  7. 4(d)Outline how follicle-stimulating hormone (FSH) controls the production of oestrogen.[2 marks]

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