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What does homologous mean?

Looking for the meaning or definition of the word homologous? Here's what it means.

Adjective
  1. (biology) Corresponding to a similar structure in another life form with a common evolutionary origin.
  2. (chemistry) Belonging to a series of aliphatic organic compounds that differ only by the addition of a CH2 group.
  3. (genetics) Having the same morphology as another chromosome.
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Examples
It would not be safe to assume that the synapsid temporal fenestra is strictly homologous to the lower temporal fenestra of diapsids.
At the beginning of meiosis, each primordial sex cell has paired homologous chromosomes, just like any other eukaryotic cell.
Different from bivalent polyploids, multivalent polyploids pair their chromosomes among more than two homologous copies at meiosis.
Vestigial structures are often homologous to structures that function normally in other species.
Thus, poriferan spicules and chancelloriid sclerites do not appear homologous.
Those similar genes from the mother and father will be located at the same spot on each homologous chromosome.

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