DP Biology (first assessment 2025)

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Question 21M.1A.SL.TZ1.35

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ1.35
Level SL Paper 1A Time zone TZ1
Command term Question number 35 Adapted from N/A
35.
[Maximum mark: 1]
21M.1A.SL.TZ1.35

Which statement is valid regarding chromatids?

A. Sister chromatids separate during meiosis I.

B. Chiasmata form between non-sister chromatids.

C. Crossing over is the exchange of DNA between sister chromatids only.

D. Non-sister chromatids have the same combination of alleles.

[1]

Markscheme

B

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