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Question 18N.2.HL.TZ0.3b

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.2.HL.TZ0.3b
Level HL Paper 2 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 2]
18N.2.HL.TZ0.3b
(b)

Outline the role of short tandem repeats in DNA profiling.

[2]

Markscheme

a. tandem repeats allow individuals to be distinguished/compared/identified
OR
tandem repeats are used to identify the source of a DNA sample ✔

b. unique/different number of repeats/combination of tandem repeats in each individual
OR
unique/different pattern of bands in each individual ✔

c. PCR used for copying/amplifying «tandem repeats» ✔

d. gel electrophoresis used for separation «of tandem repeats»/create pattern of bands ✔

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