DP Biology (first assessment 2025)

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Question SPM.1A.HL.TZ0.31

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Date May Specimen-2023 Marks available [Maximum mark: 1] Reference code SPM.1A.HL.TZ0.31
Level HL Paper 1A Time zone TZ0
Command term Question number 31 Adapted from N/A
31.
[Maximum mark: 1]
SPM.1A.HL.TZ0.31

Female grasshoppers have XX sex chromosomes and males have XO, signifying a single X chromosome. An X chromosome will be present in only half of the male gametes. A recessive mutation is induced by radiation in the X chromosome of a male. In which generation will the effect of this radiation appear?


A.  F1 females

B.  F1 males

C.  F2 females

D.  F2 males

[1]

Markscheme

D

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