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IB Biology HL 2.2.10 Monozygotic twin studies Question Bank

Practise IB Biology HL 2.2.10 by applying monozygotic twin studies concepts to exam-style questions.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • identify the relevant biological structure, process or evidence
  • apply the correct biological mechanism to the question
  • evaluate the result using data, adaptation or ecological reasoning

D2.2.10 (HL)—Monozygotic twin studies question 1

[Maximum number: 1]

What is the difference between the DNA of adult identical (monozygotic) twins?

A

Order of genes

B

Sequence of nucleotides

C

Methylation pattern

D

Ratio of complementary base pairs

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