Dictionary » H » Homologous Structures

Homologous Structures

Definition

noun

(evolutionary biology) Structures derived from a common ancestor or same evolutionary or developmental origin


Supplement

Homologous structures may not necessarily perform the same function but they share a common ancestral origin.

For instance, the forelimbs of humans and bats are homologous structures. Although they are used differently, the basic skeletal structure is the same and they are derived from the same embryonic origin. Their similarity in this regard could indicate a likely evolution from a common ancestor.


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I have got some BIG issues! forgive the long post

... catalyzed by the enzymes called glycosyltransferases. Immuno-dominant structures of A and B antigens are synthesized by a series of reactions; ... is controlled by 3 closely linked loci on each chromosome of a homologous pair. 2. Each locus has its own set of alleles which are Dd, Cc, ...

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by saddy51
Sun Jan 04, 2015 10:39 am
 
Forum: Genetics
Topic: I have got some BIG issues! forgive the long post
Replies: 1
Views: 1707

Speciation and Evolution

... question, I'd go with A, because B says to compare vestigial structures in fossil and compare with functional structures in living organisms. ... my guess. One can still find functional structures in nowadays animals homologous with vestigial structures from past organisms, I'd say.

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by JackBean
Mon Nov 25, 2013 12:39 pm
 
Forum: Evolution
Topic: Speciation and Evolution
Replies: 6
Views: 7542

Speciation and Evolution

... com/content/media/917517-4162013-72829-PM-1012149111.jpg A. to compare structures in the fossil with homologous structures in other vertebrates. B. to look for vestigial structures in the fossil ...

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by 1357
Mon Nov 25, 2013 4:01 am
 
Forum: Evolution
Topic: Speciation and Evolution
Replies: 6
Views: 7542

Why must we avert the genome of Eden?

... been learned about gene physiology makes it evident that the search for homologous genes is quite futile except in very close relatives. If there ... revealed that the genes that control the development of these structures are the same in every case (PAX6)5. This is not what someone would ...

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by Hunor
Mon Sep 23, 2013 12:08 am
 
Forum: Evolution
Topic: Why must we avert the genome of Eden?
Replies: 6
Views: 14455

Human and Elephants fingers..?

... is elephants and humans fingers? Like are they analogous, mimic, homologous, vestigial structures?

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by opalrojek
Fri Nov 11, 2011 4:33 am
 
Forum: Cell Biology
Topic: Human and Elephants fingers..?
Replies: 1
Views: 2364
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