Linked Questions

95 votes
8 answers
23k 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 ...
27 votes
3 answers
12k 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 ...
Timothy's user avatar
  • 886
26 votes
5 answers
5k 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 ...
user1205901 - Слава Україні's user avatar
15 votes
2 answers
994 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 ...
Özgür's user avatar
  • 561
7 votes
1 answer
11k 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 ...
gc5's user avatar
  • 820
9 votes
1 answer
4k 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 (...
Remi.b's user avatar
  • 68.1k
1 vote
1 answer
5k 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 ...
March Ho's user avatar
  • 9,452
-2 votes
1 answer
565 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 ...
vonjd's user avatar
  • 1,061
1 vote
1 answer
222 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 ...
Display Name's user avatar
2 votes
1 answer
405 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 ...
Aidan Rocke's user avatar