Epigenetics

• What is polygenic inheritance?


  A characteristic showing continous variation, that is determined by multiple genes at different loci
• Explain how epigenetic changes affect the development of tissues in an embryo

  1. DNA is wrapped around histones.
  2. Histone modification causes chromosome to unwind / affects binding of tRNA polymerase.
  3. DNA methylation affects production of mRNA
  4. this affects transcription of genes, altering gene expression