Navigation Links
Molecular phylogeny


Molecular phylogeny is the use of a gene's molecular characteristics to classify an organism and to place it on a map of evolutionary relationships known as the phylogenetic tree.

Every living organism is composed of certain substances such as DNA, RNA, and proteins. Closely related organisms generally have a high degree of agreement in the molecular structure of these substances, while the molecules of organisms distantly related usually show a pattern of dissimilarity. Molecular phylogeny uses such data to build a "relationship tree" that shows the probable evolution of various organisms. Not until recent decades, however, has it been possible to isolate and identify these molecular structures. That it is now possible to do so can be seen by the ever more popular use of genetic testing to determine a child's paternity, as well as the emergence of a new branch of criminal forensics focused on genetic evidence.

The effect on traditional scientific classification schemes in the biological sciences has been dramatic as well. Work that was once immensely labor- and materials-intensive can now be done quickly and easily. As a result many branches of the phylogenetic tree have been disassembled and reassembled into patterns based on molecular identification rather than on the previous system of taxonomy based on morphology.

Because it is now possible to infer a gene's relationships by the existence of molecular similarities between it and other genes, it is also possible to use that information to determine the relationships of organisms based on the presence or absence, and the DNA sequence, of various genes.

See also: phylogeny - molecular evolution - DNA barcode

External links


'"/>


(Date:3/6/2017)... SAN MATEO, Calif. , March 6, 2017 ... predictive marketing and sales technology, today announced Predictive ... (AI) solution for infusing actionable sales intelligence into ... customers to automatically enable their sales organizations with ... contextual messages that allow for intelligent engagement. Predictive ...
(Date:3/2/2017)... Summary This report provides all ... and its partnering interests and activities since 2010. ... The Partnering Deals and Alliance since 2010 report provides ... of the world,s leading life sciences companies. ... ensure inclusion of the most up to date deal ...
(Date:3/2/2017)... , March 2, 2017 Australian stem ... (ASX: CYP), has signed an agreement with the ... the Monash Biomedicine Discovery Institute and Department of Pharmacology ... conduct a further preclinical study to support the use ... of asthma.  Asthma is a chronic, ...
Breaking Biology News(10 mins):
Other biology definition