Homology
(Science: embryology, genetics) two anatomical structures or behavioural traits within different organisms which originated from a structure or trait of their common ancestral organism.
Homology (biology)
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homology -- Two structures are considered homologous when they are inherited from a common ancestor which possessed the structure. This may be difficult to determine when the structure has been modified through descent.
Homology
(i) Sequence identity between two nucleotide sequences. (ii) Genetic relatedness between two sequences of common ancestry. Commonly confused with sequence similarity.
homology
[Gk. homologia, agreement]
Similarity in characteristics resulting from a shared ancestry.
homosporous ...
Homology: Similarity in DNA or protein sequences between individuals of the same species or among different species.
Homologous chromosome: Chromosome containing the same linear gene sequences as another, each derived from one parent.
homology
similarity in characteristics resulting from a shared ancestry.
homospory
The possession of only one form of spore. This gives rise to a single gametophyte generation carrying both male and female reproductive organs.
homology Similarity of parts or organs of different organisms caused by evolutionary derivation from a corresponding part or organ in a remote ancestor, and usually having a similar embryonic origin. May also refer to a matching pair of chromosomes.
Pleckstrin homology (PH) domains and phosphoinositides
Mark A. Lemmon1
Department of Biochemistry and Biophysics, University of Pennsylvania School of Medicine, 809C Stellar-Chance Laboratories, 422 Curie Boulevard, Philadelphia, PA 19104-6059, U.S.A.
Anatomical homology: an example
Embryonic Development
Recapitulation
Protein Sequences ...
Anatomical parahomology
Molecular parahomology
Anatomical convergence
Molecular convergence
Anatomical suboptimal function
Molecular suboptimal function ...
SH2 domain (Src homology domain) A domain of approximately 100 amino acids that binds to phosphotyrosine residues.
SH3 domain (Src homology domain) A domain that binds proline-rich stretches of polypeptide.
This is called homology. While cladistic analysis assumes that most synapomorphies will arise by homology, they can arise by other ways.
One of the key ideas in bioinformatics research is the notion of homology.
The complementary probability, 1-fAB, is the probability that these two genes come from unrelated ancestors.
Related Terms:
Homology
Similarities in DNA or protein sequences between individuals of the same species or among different species.
A chromosome pair with some homology but differing in size, shape, or staining properties. Homologous chromosome pair which are not morphologically identical (eg the sex chromosomes).
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
PRODOM Prodom families are built using a recursive PSI-BLAST homology search. Only those ProDom families included in INTERPRO are included in the ProDom assignments for Arabidopsis proteins.
Concerted (coincidental) evolution: The preservation of sequence homology among members of a multigene family within the same species.
Conf. on Systems Sci.
HLA human leukocyte antigen
HMDP Homology Database
HNPCC hereditary nonpolyposis colorectal cancer
HSA human serum albumin
HUGO Human Genome Organisation ...
 See also: DNA, Sequence, Human, Organ, Protein
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