DP Biology (first assessment 2025)

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Question 23M.1A.SL.TZ2.5

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1A.SL.TZ2.5
Level SL Paper 1A Time zone TZ2
Command term Question number 5 Adapted from N/A
5.
[Maximum mark: 1]
23M.1A.SL.TZ2.5

The image shows a cell from the root tip of an onion (Allium cepa) (2n = 16) during late prophase of mitosis.

[Source: Davidson, M.W. and Molecular Expressions at Florida State University, n.d. Late prophase. [image online]
Available at: https://micro.magnet.fsu.edu/micro/gallery/mitosis/mitosis.html [Accessed 5 October 2021].]

 

How many chromatids are present in the cell?


A.  8

B.  16

C.  32

D.  64

[1]

Markscheme

C

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