DP Biology (first assessment 2025)

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Question 19N.1A.SL.TZ0.15

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.1A.SL.TZ0.15
Level SL Paper 1A Time zone TZ0
Command term Determine Question number 15 Adapted from N/A
15.
[Maximum mark: 1]
19N.1A.SL.TZ0.15

A variety of Pelargonium has yellow leaves. When plants of this variety are crossed, the resulting seeds produce green, yellow and white seedlings in the ratio 1 : 2 : 1. If plants with yellow leaves are crossed with plants with green leaves, what would the expected ratio of phenotypes in the offspring be?

[1]

Markscheme

C

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