DP Biology (first assessment 2025)

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Question 21M.1A.SL.TZ2.12

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ2.12
Level SL Paper 1A Time zone TZ2
Command term Question number 12 Adapted from N/A
12.
[Maximum mark: 1]
21M.1A.SL.TZ2.12

The image shows tetrads in the anther of a lily. A tetrad is a group of four cells, produced when one mother cell divides by meiosis. The tetrad indicated by the arrow contains a total of 48 chromosomes.

[Source: [Tetrad], 2012. [image online] Available at: https://www.iasprr.org/old/iasprr-pix/lily/tetrad.jpg [accessed: 4 April 2019]. Photo courtesy of Professor Scott D. Russell.]

 

What is the diploid number of the plant?

A. 12

B. 24

C. 48

D. 96

[1]

Markscheme

B

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