Linked Questions

32 votes
7 answers

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 ...
Farhan stands with Palestine's user avatar
20 votes
4 answers

Are mutations a source of genetic variation?

Here is a question from the book SAT II Success Biology E/M (where the SAT is the exam taken by the American high school students): Which of the following statements is true about mutations? (A) ...
Elena Kolumba's user avatar
12 votes
4 answers

What is the definition of "Natural Selection"?

Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. Natural selection, a process that results in the adaptation of an organism to its ...
Zuhair Al-Johar's user avatar
8 votes
2 answers

Why do humans grow taller than their ancestors?

I'm taking the Introduction to Genetics And Evolution course and in the first lecture it was said that: Evolution in a biological sense is simply a change through time. And very importantly, that ...
Artmal's user avatar
  • 342
10 votes
4 answers

Genes and Intelligence

Assuming that intelligence has a genetic component, • do we know which genes contribute to it? and, if so, • can we predict intelligence from genomic analysis?
Siddhartha's user avatar
0 votes
2 answers

Why is Lamarck's evolutionary theory considered incorrect? [closed]

Many sources postulate without much argumentation that Lamarck's evolutionary theory is "obviously incorrect". A classic example provided in such sources is the one with giraffes, in which Lamarck ...
Alex's user avatar
  • 111
12 votes
3 answers

What is the definition of a mutation?

There are two alleles that determine the sensitivity of a person to Coumadin (a medicine for blood thinners used to treat a stroke etc). Sometimes you encounter the terminology that one has a mutation ...
Marijn 's user avatar
  • 2,765
8 votes
1 answer

Are males taller than females in humans?

Is there any scientific evidence that in humans males are taller than females? And if so, what is the reason that they are taller (please include genes or hormones that accounts for human growth and ...
shnisaka's user avatar
  • 221
10 votes
3 answers

Genetic Diversity and Adaptation

I am somewhat new to evolutionary biology, having studied it on my free time as a computer science student. There is one particular thing that has always bothered me for which I have not seen a good ...
mellamokb's user avatar
  • 203
2 votes
2 answers

Are identical twins clones? [closed]

Identical twins have the same genetic make up but they differ in development so are they in a way clones?
Rashika's user avatar
  • 29
3 votes
2 answers

How to interpret the breeders equation?

The univariate breeders equation is defined as, $\ R = h^2 s$ where $\ R $ is the response, $\ h^2 $ is the heritability (additive genetic variation), $\ s $ is the selection differential. The ...
rg255's user avatar
  • 16k
9 votes
1 answer

Are we naturally born right or left handed or ambidextrous?

Most of you here will be right or left handed. A few might be ambidextrous. But were we born that way? I'm wondering if everyone was born ambidextrous, but as they grew up became more dependent on ...
Beastly Gerbil's user avatar
1 vote
4 answers

Is every decision we make already "pre-programmed" because of DNA? [closed]

DNA has information about our cells and how every cell should act. Since I am made entirely of cells, including things that make my mind, aren't decisions coded for by DNA by proxy of our cells. ...
griffinwish's user avatar
8 votes
2 answers

Examples of environmentally influenced gene-expression in humans?

In discussions of the relevant importance of genetic and environmental influences on the development of the individual, it's often stated that the genetic and environmental influences interact. An ...
Maringo7's user avatar
7 votes
1 answer

Why does the slope of parent-offspring regression equals the heritability in the narrow sense?

Background ---- Notations and assumptions ---- let $W_{ij}$ be the fitness associated to the genotype $AiAj$. $x$ is the frequency of the allele $A1$ in the population. The frequency of the allele $...
Remi.b's user avatar
  • 68k

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