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D2.2.7 (HL)—Epigenetic inheritance

Epigenetic inheritance transmits gene-expression states without DNA sequence change when tags persist through cell division or reproduction across generations and tissues.

Syllabus
First assessment 2025
Objective
D2.2.7
Level
HL

Concept essentials

  • Epigenetic inheritance passes expression states rather than DNA sequence changes.
  • Some DNA methylation or histone marks can persist through cell division.
  • Inherited epigenetic marks can influence gene activity in descendant cells.
  • Epigenetic inheritance is distinct from mutation of an allele.
ConceptIB Biology HL