LO69 Identify whether a trait is epigenetic or genetic given an example. It has been shown that salmon reared in hatchery when released to the wild have reduced fitness. Studies have found that there are no changes between the genetic information between salmon grown in hatchery and wild salmon that are from the same river. It has been noted that the hatchery environment causes hypermethylation of DNA in areas associated with ion homeostasis, synaptic and neuromuscular regulations and immune and stress response. Changes persisted in five generations. Based on the information presented this is an example of: Genetic effect Transcriptional effect Epigenetic effect Adverse effect Environmental effect

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.