Linked Questions

2
votes
0answers
48 views

Adaptation by standing genetic variation and fitness variance [duplicate]

I've read a couple of paper on Fisher's Fundamental Theory of Natural selection that states: $W(t+1) = W(t) + Var_{W}(t)$ Given a population with some degree of genetic variability, and assuming that ...
33
votes
7answers
12k views

Is evolution a fact? [closed]

Richard Dawkins in one of his videos says that Evolution is a fact and not just a theory. He goes on to say that man and chimpanzees both evolve from apes. Is this correct (Is evolution a fact and ...
15
votes
2answers
865 views

Did Darwin ever reach the conclusion that selection will remove variation?

According to simple models of selection the genetic variance in a population should be reduced by selection. (Fisher's fundamental theorem states that the rate at which a population can evolve is ...
5
votes
4answers
2k views

Fisher's Fundamental Theorem of Natural Selection

Ronald Fisher discovered what he, with humility, called the Fundamental Theorem of Natural Selection. This theorem says (in its modern terminology): The rate of increase in the mean fitness of any ...
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 ...
5
votes
1answer
2k views

What is needed for a G-matrix?

I have been doing a lot of reading on quantitative genetics and the G- (and B-) matrix lately. I get the principle behind performing the analysis now but I am still not sure how to do it. I'd like to ...
2
votes
2answers
263 views

Infer gene frequency within a species over time

I was reading Karlsson et al. (2014) and I came into this: A selected variant that increases rapidly in frequency in the past ~250,000 years can be detected as an unusual reduction in genetic ...
3
votes
1answer
239 views

How to predict future generations from heritability

The heritability of human intelligence is estimated to be around 0.5. There are of course various estimates, some lower, some higher. But let's work with this value of 0.5 for the moment. I wanted ...
2
votes
2answers
92 views

Heritability of trait stronger from one sex over another?

Given a trait that can be expressed (and measured) in both parents (e.g weight, height, strength, speed), are there ever traits in the child that correlate better with one sex parent than the other? ...
0
votes
1answer
89 views

How are the dominance and additive effects reflected in the mean and variance of the offsprings of two individuals with known phenotype?

If I estimated the genetic additive σ2A, genetic dominance σ2D and environmental effect σ2E of a trait in a population, what will be the predicted value of the offsprings of two individuals with known ...