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Question 17N.1.HL.TZ0.36

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.1.HL.TZ0.36
Level HL Paper 1 Time zone TZ0
Command term Deduce Question number 36 Adapted from N/A
36.
[Maximum mark: 1]
17N.1.HL.TZ0.36

In a plant, dark leaves are dominant to pale leaves and yellow seeds are dominant to white seeds.

A heterozygous dark-leaved plant with yellow seeds was crossed with a pale-leaved plant with white seeds. A large number of offspring were produced. They were either dark-leaved with yellow seeds or pale-leaved with white seeds in equal number.

What is the most likely cause of this pattern?

A. Crossing over has occurred.

B. The two genes are linked.

C. The traits are polygenic.

D. The genes are codominant.

[1]

Markscheme

B

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