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CAIE A Level Biology 9700 · Inheritance

Inheritance: outline question

Outline4 marksStandard

A student is given two photomicrographs of cells from the same plant species undergoing meiosis. Both cells are in anaphase. Cell A shows chromosomes moving to opposite poles; each chromosome appears as two chromatids joined at a centromere. Cell B also shows chromosomes moving to opposite poles, but each chromosome appears as a single chromatid. Outline the features visible in these photomicrographs that allow a student to identify which cell is in anaphase I and which is in anaphase II.

0 words · 4 marks

No account needed for your first marks. Your answer is used only to mark it.

How this question is marked

4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.

Outline means: Give the main points briefly. Less detail than describe, but every key step has to be there. One short line per step, in order. The marks are for coverage, not depth.

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