IB Biology D2.2: Gene expression HL only (first exams in 2025)

This lesson can be purchased as part of the IB Complete course bundle (first exams 2025) at a heavily discounted price, formed of 40 fully resourced lessons, end of topic exams and student checklists. It can be found here

This PowerPoint contains everything you need to teach the Theme/Unit D2.2: Gene expression (HL only) in the new IB Biology specification.

YouTube video is a preview of the full resource (does not include all slides)

This Powerpoint consists of over 40 slides and contains the followings:

All the information the IB have included in the new spec.

Clear diagrams
Student friendly content
Summary videos
Student research tasks
Clearly identified HL and SL content
Student checklist
Summary

The following content is included:

D2.2.1: Explain the term gene expression.
D2.2.1: Outline how transcription can be regulated by proteins that bind to DNA.
D2.2.1: Outline how translation can be regulated through the degradation of mRNA.
D2.2.1: Explain the term epigenesis.
D2.2.1: Describe the differences between the genome, transcriptome and proteome of individual cells.
D2.2.1: Outline how methylation can affect gene expression.
D2.2.1: Identify why some epigenetic changes are heritable.
D2.2.1: Describe examples of how the environment can affect gene expression.
D2.2.1: Outline consequences of removing epigenetic tags from human gametes.
D2.2.1: Discuss the use of monozygotic twins to study gene expression.
D2.2.1: Describe examples of external factors that can impact gene expression.