Kouprey: The Ultimate Mystery Mammal

Kouprey: The Ultimate Mystery Mammal

Ten years ago, while on a wildlife trip to India, our national park jeep came around a bend and came across a herd of gaur, wild oxen with large horns and striking colors that can weigh a ton.Consider this: The kouprey is a large wild animal with spectacular horns that can weigh 1,500 pounds.

The Evolutionary Importance of Neutral vs. Adaptive Genes

The Evolutionary Importance of Neutral vs. Adaptive Genes

For most of the first half of the 20th century, population geneticists largely attributed genetic differences between populations and species to adaptation through positive selection.Motoo Kimura proposed in 1968 that most mutations might be neutral in effect rather than beneficial or harmful, and that shifts in the frequency of these neutral mutations dominated evolutionary change at the genomic level.Annual ReviewsBut in 1968, the famed population geneticist Motoo Kimura resisted the adaptationist perspective with his neutral theory of molecular evolution.