Linked Questions

72
votes
8answers
16k views

Why do some bad traits evolve, and good ones don't?

If a trait would be advantageous to an organism then why hasn't it evolved yet? Conversely, if a trait is not advantageous or mildly disadvantageous, why does it exist? In other words why does ...
26
votes
5answers
11k views

Why haven't prey evolved the ability to always outrun their predators?

I can understand why some prey can't outrun a recently evolved species. However, since cheetahs have existed for so long, why haven't its prey evolved to always outrun it, driving cheetahs to ...
22
votes
4answers
3k views

Why is a heritability coefficient not an index of how “genetic” something is?

On his blog, Eric Turkheimer writes: [T]aken as a number, a unit of analysis, heritability coefficients are funny things to aggregate on such a massive level. What exactly are we supposed to ...
15
votes
2answers
888 views

Evolution in 37 years, is it possible?

I am confused, can evolution ( speciation ) really occur in such a short time ? In 1971, biologists moved five adult pairs of Italian wall lizards from their home island of Pod Kopiste, in the ...
7
votes
1answer
9k views

What is the standing genetic variation?

I am reading this review. In the first part, the author introduces Standing Genetic Variation, described as: STANDING GENETIC VARIATION Allelic variation that is currently segregating within a ...
8
votes
1answer
3k views

Fisher's Geometric Model for Dummies

Fisher's geometric model is still today one of the most important and fundamental model in evolutionary biology but it seems to me that most student in evolutionary biology don't really understand it (...
1
vote
1answer
4k views

How would cloning affect conservation of rare species?

Many species are at risk of extinction, and cloning could be seen as a relatively quick method to produce large numbers of members of the species to aid in conservation efforts, especially if the ...
-2
votes
1answer
514 views

Approaches towards a theory of innovation in evolution

Evolutionary biologist Andreas Wagner writes in his book "The Origins of Evolutionary Innovations: A Theory of Transformative Change in Living Systems" (Oxford University Press, 2011): We are ...
1
vote
1answer
197 views

What is projected to go extinct first? [closed]

Though a number of animals have been going extinct at alarmingly quicker rates (so called anthropocene extinction), a number of 'star' threatened animals are still alive. Which of the following ...
2
votes
1answer
349 views

Under what circumstances does Batesian mimicry evolve? [closed]

Batesian mimicry is a form of biological resemblance in which a noxious, or dangerous, organism (the model), equipped with a warning system such as conspicuous colouration, is mimicked by a harmless ...