paralogous

(adjective)

having a similar structure indicating divergence from a common ancestral gene

Related Terms

  • retrogene
  • genetic drift
  • nondisjunction

Examples of paralogous in the following topics:

  • Homologous Structures

    • Homologous sequences are considered paralogous if they were separated by a gene duplication event; if a gene in an organism is duplicated to occupy two different positions in the same genome, then the two copies are paralogous.
    • A set of sequences that are paralogous are called paralogs of each other.
    • Paralogs typically have the same or similar function, but sometimes do not.
    • Paralogous genes often belong to the same species, but not always.
    • For example, the hemoglobin gene of humans and the myoglobin gene of chimpanzees are considered paralogs.
  • Gene Duplications and Divergence

    • Both orthologous genes (resulting from a speciation event) and paralogous genes (resulting from gene duplication within a population) can be said to display divergent evolution.
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