Homologous
The relationship between two chromosomes that are paired and so are homologs of each other.
* * *
Corresponding or alike in certain critical attributes. 1. In biology or zoology, denoting organs or parts corresponding in evolutionary origin and similar to some extent in structure, but not necessarily similar in function. 2. In chemistry, denoting a single chemical series, differing by fixed increments. 3. In genetics, denoting chromosomes or chromosome parts identical with respect to their construction and genetic content. 4. In immunology, denoting serum or tissue derived from members of a single species, or an antibody with respect to the antigen that produced it. 5. Proteins having identical or similar functions (particularly with respect to proteins from different species). [see homolog]

* * *

ho·mol·o·gous hō-'mäl-ə-gəs, hə- adj
1 a) having the same relative position, value, or structure: as (1) exhibiting biological homology (2) having the same or allelic genes with genetic loci usu. arranged in the same order <\homologous chromosomes>
b) belonging to or consisting of a chemical series whose members exhibit homology
2 a) derived from or involving organisms of the same species <\homologous tissue grafts> compare AUTOLOGOUS, HETEROLOGOUS (1)
b) relating to or being immunity or a serum produced by or containing a specific antibody corresponding to a specific antigen
ho·mol·o·gous·ly -lē adv

* * *

adj.
1. (in anatomy) describing organs or parts that have the same basic structure and evolutionary origin, but not necessarily the same function or superficial structure. Compare analogous.
2. (in genetics) describing a pair of chromosomes of similar shape and size and having identical gene loci. One member of the pair is derived from the mother; the other from the father.

* * *

ho·mol·o·gous (ho-molґə-gəs) [Gr. homologos agreeing, correspondent] 1. corresponding in structure, position, origin, etc., as (a) the feathers of a bird and the scales of a fish, (b) antigen and its specific antibody, (c) allelic chromosomes. Cf. analogous. 2. allogeneic. 3. pertaining to an antibody and the antigen that elicited its production.

Medical dictionary. 2011.

Synonyms:

Look at other dictionaries:

  • Homologous — Ho*mol o*gous, a. [Gr. ? assenting, agreeing; ? the same + ? speech, discourse, proportion, ? to say, speak.] Having the same relative position, proportion, value, or structure. Especially: (a) (Geom.) Corresponding in relative position and… …   The Collaborative International Dictionary of English

  • homologous — [hō mäl′ə gəs] adj. [Gr homologos, agreeing < homos, SAME + legein, say: see LOGIC] 1. corresponding in structure, position, character, etc.: opposed to HETEROLOGOUS 2. Biol. corresponding in basic type of structure and deriving from a common… …   English World dictionary

  • homologous — homologous. См. гомологичный. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • homologous — index analogous, coequal, coextensive, cognate, comparable (capable of comparison), equal Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • homologous — 1650s, from Gk. homologos agreeing, of one mind, from homos same (see HOMO (Cf. homo ) (1)) + logos relation, reasoning, computation, related to legein reckon, select, speak (see LECTURE (Cf. lecture) (n.)) …   Etymology dictionary

  • homologous — ► ADJECTIVE 1) having the same relation, relative position, or structure. 2) Biology (of organs) similar in position, structure, and evolutionary origin. DERIVATIVES homologize (also homologise) verb homology noun. ORIGIN Greek homologos agreeing …   English terms dictionary

  • homologous — /heuh mol euh geuhs, hoh /, adj. 1. having the same or a similar relation; corresponding, as in relative position or structure. 2. corresponding in structure and in origin, but not necessarily in function: The wing of a bird and the foreleg of a… …   Universalium

  • homologous — adjective Showing a degree of correspondence or similarity. : Corresponding to a similar structure in another life form with a common evolutionary origin. :, : Lobules, homologous in structure, recur again only in the Gondwanalandic families… …   Wiktionary

  • homologous — adjective Etymology: Greek homologos agreeing, from hom + legein to say more at legend Date: 1660 1. a. having the same relative position, value, or structure: as (1) exhibiting biological homology (2) having the same or allelic genes with… …   New Collegiate Dictionary

  • homologous — (1) Derived from the tissues or DNA of a member of the same species. cf heterologous, autologous, homologous recombination. (2) Of genes, similar in sequence, cf. analogous …   Dictionary of molecular biology

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”