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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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: 4530

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: 4530

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: 7210

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: 1677

Year 12 exam help

... fly through the air and then asks what it is an example of a) Analogous Structures b) Homologous Structures c) Continuous Structures d) Discontinuous Structures I understand the ...

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by Rose165
Fri Oct 28, 2011 2:44 am
 
Forum: Evolution
Topic: Year 12 exam help
Replies: 3
Views: 2039
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