as in parapatric speciation. At least five cases of speciation genes have been confirmed so far. Most bear a strong signature of positive selection. Three of the five known speciation genes are ...

Hybrid speciation is quite rare in animals ... their collaborators sequenced and analyzed DNA from 425 individuals for five of the Pachyptila species, and for the closely-related blue petrel ...

of the difference between the full unconstrained six-parameter model and a five-parameter model with the speciation or transition rates constrained to be equal.

Today, biologists are much more knowledgeable about this process, which they call “speciation.” Here’s what you need to know about speciation, and about the primary pathways of this process, known as ...

the researchers have discovered at least eleven new instances of sympatric speciation and suggest that as many as one in five species on the island may be the products of this process. More ...

The biological equivalent is "allopatric speciation," an evolutionary process in which one species divides into two because the original homogenous population has become separated and both groups ...

Titled "Factors influencing progress toward sympatric speciation," the paper appears in today's edition of the Journal of Evolutionary Biology. New species more commonly occur when plants or ...

Now, Umeå researchers Mats Dynesius and Roland Jansson argue that there is another very important reason for the variation in speciation probability: The groups within a species that may ...

Save guides, add subjects and pick up where you left off with your BBC account. As long as the individuals in a population have the opportunity to interbreed and combine genes, they remain one ...