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6 marksReproduction in Plants

CAPE Biology Unit 1 · May/June 2019 · Paper 2 · Question 3(b)(ii)

Self-incompatibility is determined by multiple alleles at the S locus.

Differentiate between: self-incompatibility and male sterility; monoecy and dioecy; and protandry and protogyny.

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Other parts of this question

  1. 3(a)(i)Draw a well-labelled flow diagram of the process of oogenesis starting from the primary oocyte.[5 marks]
  2. 3(a)(ii)State the role of ONE named hormone in oogenesis.[2 marks]
  3. 3(a)(iii)Provide annotations on ONE function of EACH of the structures labelled A–D in the diagram of a sperm cell shown in Figure 4.[4 marks]
  4. 3(a)(iv)Relate any ONE structural feature of a sperm cell to its functions.[2 marks]
  5. 3(b)(i)Complete the table to show the extent of fertilization possible between the given genotypes of the parents using -, +, or -+.[3 marks]
  6. 3(c)(i)Explain TWO major genetic consequences of self-pollination.[4 marks]
  7. 3(c)(ii)Explain TWO major genetic consequences of cross pollination.[4 marks]

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