DP Biology (first assessment 2025)

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Question 22M.2.SL.TZ1.4a

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.2.SL.TZ1.4a
Level SL Paper 2 Time zone TZ1
Command term State Question number a Adapted from N/A
a.
[Maximum mark: 1]
22M.2.SL.TZ1.4a
(a)

State the probability that Edward had hemophilia.

[1]

Markscheme

0.5/50 %;

Examiners report

Approximately 50 % of the candidates were correct with their answer of 50 %. It was expected that candidates would recognize that Edward is male because he has a box rather than circle in the pedigree. Then from there, they would calculate the 50 %.

Syllabus sections