9700 · October/November 2025 · examinable unit

9700/41 Question 10

Cambridge Biology · 6 marks. This page is the question object — what is being tested — not the mark scheme.

Stem preview

Explain the relationship between genes, proteins and phenotype, with reference to two examples of genetic diseases in humans.

Full stem stays in the official paper. We show a short excerpt so you can identify the item, then attempt your own answer.

What the examiner is asking

This 9700/41 item (6 marks, October/November 2025) is testing whether you can apply the linked topic under timed exam conditions — not whether you can recall a textbook paragraph. Read the command word, identify the quantity or argument required, and plan the mark-earning steps before you write.

Prerequisite concepts

Core definitions and relationships for the linked topic
Command-word literacy (state / describe / explain / calculate / deduce)
Showing method lines examiners can credit even if the final answer slips

Similar practice

After you attempt this question, mark it, then take another 9700 past-paper item on the same topic so the weakness becomes a habit fix — not a one-off score.

Try it yourself — mark my answer How marks are awarded (assessment page)