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5 marksCellular Respiration and ATP Synthesis

CAPE Biology Unit 2 · January 2023 · Paper 2 · Question 4(d)(i)

Attached earlobes is a recessive trait and it is not sex-linked. Mary has attached earlobes like one of her parents. Her other parent has free earlobes.

Using a genetic diagram, show the cross between Mary's parents.

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Other parts of this question

  1. 4(a)State the name of TWO processes by which organisms reproduce asexually. For EACH process, provide ONE example of an organism which reproduces in this way.[4 marks]
  2. 4(b)Asexual reproduction is NOT suitable for organisms which live in an environment that changes often. Explain ONE reason to support this statement.[2 marks]
  3. 4(c)(i)Define the following terms: Gene.[2 marks]
  4. 4(c)(ii)Define the following terms: Allele.[2 marks]
  5. 4(d)(ii)State Mary's genotype:[1 mark]
  6. 4(d)(iii)Based on the results of the cross in (d) (i), state the probability of a child having attached earlobes.[1 mark]

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