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Question 17N.1.SL.TZ0.16

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Date November 2017 Marks available [Maximum mark: 1] Reference code 17N.1.SL.TZ0.16
Level SL Paper 1 Time zone TZ0
Command term Deduce Question number 16 Adapted from N/A
16.
[Maximum mark: 1]
17N.1.SL.TZ0.16

An allele for lactase persistence allows humans to digest milk as adults. People who lack this allele are lactose intolerant in adulthood.

What is the pattern of inheritance?

A. Lactase persistence is sex-linked recessive.

B. Lactase persistence is autosomal recessive.

C. Lactase persistence is sex-linked dominant.

D. Lactase persistence is autosomal dominant.

[1]

Markscheme

D

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