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3 marksCell Division and Variation

CAPE Biology Unit 1 · 2018 · Paper 2 · Question 2(b)(ii)

A micrograph of pressed onion root meristem cells is reproduced in Figure 3, with a scale bar of 10 µm given in the lower left corner.

Identify the cell cycle stages displayed in cells D, E and F in Figure 3.

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Other parts of this question

  1. 2(a)(i)In Figure 2, insert the appropriate alleles which correspond to the phenotypes of A, B and C given the following characteristics:[3 marks]
  2. 2(a)(ii)Draw a Punnett square in the following box to illustrate a test cross involving a pea variety which is heterozygous for seed type. State the ratio of the…[3 marks]
  3. 2(a)(iii)Distinguish between 'a gene' and 'an allele'.[2 marks]
  4. 2(b)(i)Make a scaled drawing of the cells labelled D, E and F in Figure 3. Show the magnification of the drawing.[4 marks]

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