Why is sex so popular? The question of why so many organisms reproduce sexually has mystified evolutionary biologists since before Darwin, who wrote that "The whole subject is as yet hidden in ...

Scientists have discovered a new family of molecules that work together to precisely remove unwanted DNA during reproduction in single-celled, freshwater organisms called ciliates. Scientists have ...

The mating process is one of the most important mechanisms for maintaining genetic variation in natural populations. The emergence of sexual reproduction turned out to be the most important ...

Proceedings of the National Academy of Sciences of the United States of America, Vol. 87, No. 22 (Nov., 1990), pp. 8825-8829 (5 pages) Incorporation of Paramecium axonemal tubulin into lysed endosperm ...