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homologous
[huh-mol-uh-guhs, hoh-]
adjective
having the same or a similar relation; corresponding, as in relative position or structure.
corresponding in structure and in origin, but not necessarily in function.
The wing of a bird and the foreleg of a horse are homologous.
having the same alleles or genes in the same order of arrangement.
homologous chromosomes.
Chemistry.of the same chemical type, but differing by a fixed increment of an atom or a constant group of atoms.
Methyl and ethyl alcohols are homologous.
Immunology.pertaining to an antigen and its specific antibody.
homologous
/ ˌhɒm-, həʊˈmɒləɡəs, hɒ-, ˌhəʊməˈlɒdʒɪkəl /
adjective
having a related or similar position, structure, etc
chem (of a series of organic compounds) having similar characteristics and structure but differing by a number of CH 2 groups
med
(of two or more tissues) identical in structure
(of a vaccine) prepared from the infecting microorganism
biology (of organs and parts) having the same evolutionary origin but different functions Compare analogous
the wing of a bat and the paddle of a whale are homologous
maths (of elements) playing a similar role in distinct figures or functions
homologous
Similar in structure and evolutionary origin but having different functions, as a human's arm and a seal's flipper.
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.
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 CH 2 group. The alkanes (methane, ethane, propane, and others) are a homologous series of compounds.
Involving organisms of the same species, as in grafted body tissues.
Other 51Թ Forms
- nonhomologous adjective
- unhomologous adjective
- ˌdzˈDz adverb
51Թ History and Origins
Origin of homologous1
Example Sentences
The main novelty of this discovery is that the new compound, alongside the previous one, forms what's known as a 'homologous series.'
Typically, most animal and plant species exhibit a minimum of one and a maximum of three crossovers per a pair of homologous chromosomes.
Chromosomes come in pairs called homologous chromosomes that carry the genes we inherited from each of our parents -- one from our mom, one from our dad.
Micro-fragmented adipose tissue and bone marrow aspirate treatments “are minimal manipulation and, as long as the physician is injecting ‘like into like,’ this is homologous use.
“But we do share a lot of homologous genes with these seemingly very distant animals.”
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When To Use
Homologous is used to describe multiple things that are the same or similar, especially in structure or origin.In science, homologous is most often used in the phrase homologous structures, which refers to body parts of animals that have a similar structure or origin, as in The arms of humans and the limbs of cats are homologous structures—the layout of the bones is very similar. Homologous structures may have different functions. For example, a human arm and a bat’s wing are considered homologous structures because they have the same bone structure, even though they obviously have different functions.In biology, the presence of similarities like this is known as homology.Homologous structures are the opposite of analogous structures, which refers to body parts that serve similar functions but have different structures or origins. For example, both birds and wasps have wings, but their wings have different appearances and consist of different parts and evolved from different origins.Example: A horse’s leg and a whale’s flipper are homologous structures that evolved from the same origin.
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