b. In this unit, we have explored two case studies involving membrane bound proteins. i. Using a seven-membrane spanning

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b. In this unit, we have explored two case studies involving
membrane bound proteins.
i. Using a seven-membrane spanning protein as an example,
explain how a mutation can result in increased relative fitness and
natural selection. Explain how this leads to a change in allele
frequency and adaptation in a population. (150-200 words; 6
marks)
ii. Using an ion channel protein as an example, explain how a
mutation can have a deleterious effect on an individual who
possesses that trait (150-200 words). In your answer, include:
1. the mode of inheritance (including a definition); (2
marks)
2. the effect on the ion channel; (2 marks)
3. the physiological change that occurs as a result of the
mutated form of the ion channel. (2 marks)