A rare example of gene incompatibility between two species of budding yeast has been found. This discovery of elusive 'speciation' genes adds to other reproductive-isolation mechanisms operating in ...

A series of cross-fertilization experiments were conducted with two unnamed, sympatric species of sea urchins in the Echinometra mathaei species complex, Echinometra sp. A (Ea) and Echinometra sp. C ...

abstract: Crosses have revealed the species‐specific, positively correlated intensities of paternally expressed growth enhancer (GE) and maternally expressed growth suppressor (GS), which serve as a ...

When two organisms typically do not interbreed with one another, they are considered different species. But what are the reproductive barriers that isolate one population from another? Hear the ...

Slate takes a break from endless political analysis to tackle a biological question: Can humans have sex with other animals and produce offspring? The answer: "Probably not." Um, "probably"? Oh dear.

A new study of interbreeding between two species of howler monkeys in Mexico is yielding insights into the forces that drive the evolution of new species. A new University of Michigan study of ...

ANN ARBOR--A new University of Michigan study of interbreeding between two species of howler monkeys in Mexico is yielding insights into the forces that drive the evolution of new species. How do new ...