Homologous meaning

hə-mŏlə-gəs, hō-
The definition of homologous is having the same evolutionary origin, position or structure.

The wing structure of a bird and the arm structure of a man are an example of things that are homologous.

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Corresponding or similar in position, value, structure, or function.
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Relating to the correspondence between an antigen and the antibody produced in response to it.
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Derived from the same species.

A homologous graft.

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Similar in structure and evolutionary origin, though not necessarily in function, as the flippers of a seal and the hands of a human.
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Belonging to or being a series of organic compounds, each successive member of which differs from the preceding member by a constant increment, especially by an added CH2 group.
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Corresponding in structure, position, character, etc.
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Corresponding in basic type of structure and deriving from a common primitive origin.

The wing of a bat and the foreleg of a mouse are homologous.

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Corresponding or similar in position, value, structure, or function.
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Derived from the same species.

A homologous graft.

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Similar in structure and evolutionary origin, though not necessarily in function, as the flippers of a seal and the arms of a human.
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Relating to the correspondence between an antigen and the antibody produced in response to it.
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Belonging to or being a series of organic compounds, each successive member of which differs from the preceding member by a constant increment, especially by an added CH2 group.
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Similar in structure and evolutionary origin but having different functions, as a human's arm and a seal's flipper.
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Being one of a pair of chromosomes, one from the female parent and one from the male parent, that have genes for the same traits in the same positions. Genes on homologous chromosomes may not have the same form, however. For example, one chromosome in a pair of homologous chromosomes may contain a gene for brown eyes, and the other a gene for blue eyes. Human females have 23 pairs of homologous chromosomes (including the two X chromosomes), while human males have 22 because the Y chromosome is not paired.
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Belonging to or being a series of organic compounds, each successive member of which differs from the preceding member by a constant increment, especially by an added CH2 group. The alkanes (methane, ethane, propane, and others) are a homologous series of compounds.
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Involving organisms of the same species, as in grafted body tissues.
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Showing a degree of correspondence or similarity.

(chemistry) Belonging to a series of aliphatic organic compounds that differ only by the addition of a CH2 group.

(genetics) Having the same morphology as another chromosome.

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Origin of homologous

  • From Greek homologos agreeing homo- homo- logos word, proportion leg- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition