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Homologous vs. Heterologous — What's the Difference?

Homologous vs. Heterologous — What's the Difference?

Difference Between Homologous and Heterologous

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Homologous

Corresponding or similar in position, value, structure, or function.

Heterologous

The term heterologous has several meanings in biology.

Homologous

Derived from the same species
A homologous graft.

Heterologous

Not corresponding or similar in position, value, structure, or function; not homologous.

Homologous

(Biology) 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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Heterologous

(Biology) Relating to traits, such as organs or body parts, that do not correspond in structure or evolutionary origin.

Homologous

(Immunology) Relating to the correspondence between an antigen and the antibody produced in response to it.

Heterologous

Derived from a different species
A heterologous transplant.
A heterologous gene.

Homologous

Relating to chromosomes that have the same morphology and linear sequence of gene loci.

Heterologous

(Genetics) Relating to chromosomes that do not normally pair during mitosis or meiosis.

Homologous

Relating to genes that are derived from a common ancestor.

Heterologous

Relating to cells or tissues that do not usually occur in a given part of the body
A heterologous tumor.

Homologous

(Chemistry) 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.

Heterologous

Relating to a vaccine or serum that confers immunity against a pathogen that is not identical to but is immunologically related to the pathogen used to create the vaccine or serum.

Homologous

Showing a degree of correspondence or similarity.

Heterologous

Relating to an antigen and antibody that do not correspond to one another.

Homologous

(mathematics) In corresponding proportion.

Heterologous

Having different relationships or different elements

Homologous

(biology) Corresponding to a similar structure in another life form with a common evolutionary origin.
Flippers and hands are homologous structures.

Heterologous

(biology) Of, or relating to different species

Homologous

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

Heterologous

Characterized by heterology; consisting of different elements, or of like elements in different proportions; different; - opposed to homologous; as, heterologous organs.

Homologous

(genetics) Having the same morphology as another chromosome or locus; relating to a homologue.

Heterologous

Having the same evolutionary origin but serving different functions;
The wing of a bat and the arm of a man are homologous

Homologous

Playing the same role as seen in another culture, whether by historical connection, psychological archetype, convergent cultural evolution, or otherwise (as may be hypothesized but not known with certainty by current science), as for example with the cryptozoologic concepts of yeti and sasquatch, the use of polite and familiar pronouns, or other similarities.

Heterologous

Derived from organisms of a different but related species;
A heterologous graft
A homologous tissue graft

Homologous

Having the same relative position, proportion, value, or structure.
In similar polygons, the corresponding sides, angles, diagonals, etc., are homologous.

Homologous

Having the same relative proportion or value, as the two antecedents or the two consequents of a proportion.

Homologous

Having the same evolutionary origin but serving different functions;
The wing of a bat and the arm of a man are homologous

Homologous

Corresponding or similar in position or structure or function or characteristics; especially derived from an organism of the same species;
A homologous tissue graft
A heterologous graft

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