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4.4Summary

  • Gene expression is regulated according to changes in the environment.
  • Diseases occur when weaknesses in the regulatory system fail due to changes in the environment.
  • Genes determine susceptibility to diseases.
  • Transcription of RNA from DNA is regulated sequence specifically by specific proteins.
  • Gene expression is regulated by feedback in order to maintain homeostasis in the body.
  • Biological rhythms are created by feedback regulation.
  • Human genetic information is fragmented and is combined to create diversity.
  • Human genes are duplicated and increase in number in response to various conditions.
  • The genes of an organism are modified after the organism is born, and epigenomes change.
  • The epigenome is reset in the zygote.

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