Latest Selection Stories
Biologists have been observing the “selfish” genetic entity segregation distorter (SD) in fruit flies for decades. Its story is a thriller among molecules, in which the SD gene destroys maturing sperm that have a rival chromosome. A new study reveals a tactic that gives SD’s villainy an extra edge.
A new genome-wide analysis searched for evidence of long-lived balancing selection - where the evolutionary process acts not to select the single best adaptation but to maintain genetic variation in a population. The study revealed at least six regions of the genome where humans and chimpanzees share the same combination of genetic variants.
According to a new study in the journal Trends in Ecology and Evolution, determining if certain extinct animals had sexually selective traits is possible, despite the fact that we cannot observe their behavior.
The new species angling for the position of top dog and the surreptitious behavior it displays in doing so can only lead one to surmise that this animal is acting, well, like a rat.
From protozoans to mammals, evolution has created more and more complex structures and better-adapted organisms.
Why do adults continue to play throughout their lives while most other mature mammals cease such behavior?
Where’s the white hot furnace that powers evolution? For Darwin it lay in natural selection. The “Modern Synthesis” relocated it to genetic mutation.
Frequency-dependent selection fosters the diversity of populations but does not always increase the average fitness of the population.
A classic study from more than 60 years ago suggesting that males are more promiscuous and females more choosy in selecting mates may, in fact, be wrong, say life scientists who are the first to repeat the historic experiment using the same methods as the original.
Darwin made adaptation to the environment the key property of evolved living creatures. That's all natural selection can do.
- The parings of haberdine; also, any kind of fragments.