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Date May 2009 Marks available 1 Reference code 09M.1.HL.TZ1.12
Level Higher level Paper Paper 1 Time zone Time zone 1
Command term Question number 12 Adapted from N/A

Question

In a cross between red haired cattle and white haired cattle the offspring produced are always a colour called roan (light red). If the roan cattle are interbred they produce white, roan and red offspring.

How many alleles are controlling this character?

A. 1
B. 2
C. 3
D. 4

Markscheme

B

Examiners report

N/A

Syllabus sections

Core » Topic 3: Genetics » 3.4 Inheritance
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