LONG PUZZLED EVOLUTIONARY BIOLOGISTS TO SOLVE THE MYSTERY OF THE GENOME ANALYSIS
What is a start of digits in birds? The subject has prolonged undetermined evolutionary biologists. Using genomic analysis, researchers have right away solved a pass partial of this mystery.
Evolution adds and– subtracts, and– nowhere is this math some-more clear than in vertebrates, which have been automatic to have 5 digits upon any limb. But most class do not. Snakes, of course, have no digits, and– birds have three.
Yale scientists right away have a great hand–le upon how these developmental changes have been orchestrated in a embryo. But there is still a single outstand–ing discuss upon birds: Which digits have been they? A ride with index and– center fingers, or a index, center and– ring fingers?
In five-digit vertebrates, a ride comes from a predecessor branch cells labeled pa. While birds have a number which looks similar to a thumb, papa predecessor cells die off during growth and– never furnish a number in adults. As a result, scientists have wondered either predecessor cells in pb can have a thumb.
Yale scientists have finished a genomic research of birds which reveals a answer. It is a hand–s-down “yes” — even yet a initial bird number develops where a index finger upon a five-finger vertebral column should be.
The formula have been published online Sept. 4 in a biography Nature. Authors have been Zhe Wang, Rebecca L. Young, Huiling Xue, and– Gunter P. Wagner from a Department of Ecology and– Evolutionary Biology.
Blinkiz 06 Sep, 2011--
Source: http://www.digdod.com/long-puzzled-evolutionary-biologists-to-solve-the-mystery-of-the-genome-analysis-1035781.html
~
Manage subscription | Powered by rssforward.com
