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Date May 2015 Marks available 1 Reference code 15M.2.HL.TZ2.2
Level Higher level Paper Paper 2 Time zone Time zone 2
Command term State Question number 2 Adapted from N/A

Question

The image shows data collected in order to determine the paternity of a child.

State the name of the process used to produce the pattern of bands seen in the image.

[1]
a.

Determine, with a reason, which male is the father of the child.

[1]
b.

Markscheme

gel electrophoresis/DNA profiling

a.

male 1 because all child’s bands / alleles match either mother or male 1 / (approximately) half of bands match male 1 [1]
Do not accept reference to genes.

b.

Examiners report

Most candidates answered this question correctly.

a.

If candidates had difficulty with this question it was due to communication issues. Some referred to the bands as genes and others found it difficult to clearly express their rationale for identifying Male 1 as the father.

b.

Syllabus sections

Core » Topic 3: Genetics » 3.5 Genetic modification and biotechnology
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