Genetic Mismatch Keeps Yeast Species Distinct
By SCIENCEDAILY - SCIENCEDAILY
Added: Sat, 24 Jul 2010 15:27:34 UTC
Thanks to Peter for the link
How species form and what keeps them distinct from each other, even though they can interbreed, is a key question in evolution. Researchers from Taiwan, led by Dr. Jun-Yi Leu, an Assistant Research Fellow from the Institute of Molecular Biology at Academia Sinica, have recently identified genes in three closely-related yeast species that cause sterility, increasing our understanding of how species can remain distinct. The findings are published in the online, open access journal PLoS Biology.
If one species mates with another, the hybrids produced often die or are unable to reproduce. Such hybrids can provide clues about the process of speciation. At the molecular level, one cause of the inability of hybrids to reproduce (reproductive isolation) results from a mismatch between genes, which prevents those genes functioning properly. There are various types of such genetic incompatibility, one of which is a mismatch between genes in the nucleus and those in the mitochondrion (a vital organelle playing a key role in cell respiration, the process by which cells produce energy).
... Continue reading
Stephen Cave - Financial Times Comments
What we really know about our evolutionary past – and what we don’t
- - Ancestors Trail Walk Comments
WALK DARWIN’S TREE OF LIFE ~ 26 AUGUST 2012 - event begins on Saturday 25 August
Liat Clark - Wired.co.uk Comments
Astrophysicists simulate 14 billion years of cosmic evolution in high resolution
Alok Jha - The Guardian Comments
Cambridge scientists claim DNA overlap between Neanderthals and modern humans is a remnant of a common ancestor
- - Science Blog Comments
Why, after millions of years of evolution, do organisms build structures that seemingly serve no purpose?
Charles Choi - CBS News Comments
Four decades ago, in 1972, the Koobi Fora Research Project discovered the enigmatic fossilized skull known as KNM-ER 1470 which ignited a now long-standing debate about how many different species of early Homos existed.