Scientists found that evolution itself can evolve. Organisms exposed to changing environments develop a better ability to ...

As the diverse and intricate mechanisms of evolution have come to be understood, it has grown increasingly certain that the raw materials upon which they depend are the mutations of genes.

and sex-specific mutation bias may provide additional insights as to why rates of molecular evolution vary within and among species. An appreciation of these processes is necessary to clarify the ...

The field of evolution examines how organisms adapt to their environments over generations, but what about the evolution of ...

Directed evolution experiments start with large ... 2 This possibility of mutation bias and the introduction of stop codons means researchers must screen clones from the library following ...

How could a "bad" gene-- the mutation that causes the sometimes lethal sickle cell disease -- also be beneficial? On the other hand, if it didn't provide some survival advantage, why had the ...

Charles Darwin's theory of evolution generated scientific debate ... Still others proposed that spontaneous, random mutations, or changes, in organisms accounted for the variety of species.

The new study explains a longstanding puzzle in medicine: Why do some people who've inherited a disease-causing mutation experience ... some speculation that this bias toward one copy or the ...

Variation is the differences in the characteristics of organisms. It can be caused by the genes an individual inherits or the environment it lives in. Extensive genetic variation is contained ...

DNA contains genes that carry instructions for the manufacture of a protein. If a mutation occurs in a gene that results in a change to the sequence of DNA bases, then the structure of the protein ...