Biology 9700 · AS & A Level · Natural and artificial selection

Natural and artificial selection — practice question

Section B. Answer only one question.
(a)[6]

Describe the first meiotic division, meiosis I, in animal cells.

(b)[9]

Discuss how the frequency of sickle cell anaemia is related to the number of malaria cases.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Reduction division reduces the chromosome number by half” …

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