A-LevelBiologySelection and evolutionOct/Nov 2014Paper 1 Q371 Mark
Which explains why sickle cell anaemia has not been eradicated?
AIdentification of carriers is too difficult as they show no symptoms.
BSickle cell anaemia gives the individual some resistance against malaria.
CSickle cell anaemia is an inherited disease, so vaccination is not possible.
DThe gene responsible for sickle cell anaemia has a high rate of mutation.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of selection and evolution within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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