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

Natural and artificial selection — practice question

(a)[8]

Using named examples, describe and explain how continuous variation differs from discontinuous variation.

(b)[7]

Outline how selective breeding (artificial selection) has raised the yield of crops such as wheat and maize.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “discontinuous traits are governed by one/few genes” …

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