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Latest Allopatric speciation Stories

Speciation Theory Questioned
2013-09-03 14:24:14

Brett Smith for redOrbit.com - Your Universe Online While scientists have catalogued millions and millions of species, there is still no agreement on how exactly new species form. However, a new study published this week in Proceedings of the National Academy of Sciences could deal a major blow to one prevailing theory - namely, that new species arise when a barrier prevents reproduction between populations. Species-creating barriers could be physical, such as a mountain range, or they...

Paternal Cues Heavily Influence Mate Choice In Mice
2013-03-28 16:35:39

Max-Planck-Gesellschaft Hybrid offspring of different house mice populations show a preference for mating with individuals from their father's original population Mate choice is a key factor in the evolution of new animal species. The choice of a specific mate can decisively influence the evolutionary development of a species. In mice, the attractiveness of a potential mate is conveyed by scent cues and ultrasonic vocalizations. Researchers from the Max Planck Institute for Evolutionary...

Evolution Of Bacteria Has Become Predictable
2013-02-20 19:24:20

Brett Smith for redOrbit.com — Your Universe Online The principles of evolution are widely accepted, but the causes and mechanisms that drive evolution are still heavily debated. In a new study published in the open access journal PLOS Biology, two researchers found similar or identical genetic mutations can emerge in separate populations of E. coli evolving in different environments for over 1000 generations, leading the team to conclude that evolution can be fairly...

Genetic Variations Elucidate Origins of Man
2012-09-21 10:48:44

April Flowers for redOrbit.com - Your Universe Online Thousands of years ago, a genetic mutation occurred which might be the answer to how early humans were able to move from central Africa and across the continent. This movement has been called "the great expansion." Three teams of researchers, from Wake Forest Baptist Medical Center, Johns Hopkins University School of Medicine and University of Washington School of Medicine, have analyzed genetic sequence variation patterns in...

2010-04-30 08:56:58

A genetic study of island lizards shows that even those that have been geographically isolated for many millions of years have not evolved into separate species as predicted by conventional evolutionary theory. Professor Roger Thorpe and colleagues Yann Surget-Groba and Helena Johansson, at Bangor University, UK, reveal their findings April 29 in the open-access journal PLoS Genetics. Since Darwin's study of the Galapagos Islands, archipelagos have played a central role in understanding how...