Evolution
... that are phylogenetically distant. For example,
neutral human DNA sequences are approximately 1.2% ... without which evolution cannot proceed.
neutral mutations do not affect the organism's chances ... are not affected by natural selection are called
neutral mutations . Their frequency in the population is ...
Molecular evolution
...
2.3 Molecular study of phylogeny
2.4 The
neutral theory
2.5 Infinite alleles model
2.6 ... (or beneficial ) ones tend to accumulate.
neutral mutations do not affect the organism's chances ... sequencing of around 1000 base pairs .
The
neutral theory
Main article: ...
Neutral theory of molecular evolution
... The
neutral theory of molecular evolution (also, simply the
neutral theory of evolution ) is an influential theory ...
A second assertion or hypothesis of the
neutral theory is that most evolutionary change is the ...
Isozyme
... a long way from the active site then the mutation may be selectively
neutral and subject to genetic drift .
(3) In rare cases the mutation may ... are usually subtle (particularly between allozymes which are often
neutral variants ). This subtlety is to be expected, because two enzymes that ...
Alcohol
... to the left)
Nucleophilic substitution
The OH group is not a good leaving group for nucleophilic substitution reactions, so
neutral alcohols do not react in such reactions. However if the oxygen is first protonated to give R−OH 2 + , the leaving group ( water ) is much ...
Biodiversity
... of the recorded species, with 47,000 plants species and 81,000 animals.
See also : biogeography , Amazonian forest , extinction , Unified
neutral theory of biodiversity .
Is biodiversity threatened?
During the last decades, erosion of biodiversity has been increasingly observed. The ...
Cladistics
... for the character "presence of wings", a homeoplasy would be introduced into the dataset, and it might cause erroneous results.
In practice,
neutral features like exact ultrastructure (a term for extremely fine structure, microscopic or molecular composition of cellular structure) may be used to ...
Ewens's sampling formula
... m is just what the formula above would give if m were put in place of n .
References
Warren Ewens, "The sampling theory of selectively
neutral alleles", Theoretical Population Biology , volume 3, pages 87—112, 1972.
J.F.C. Kingman, "Random partitions in population genetics", ...
Extinction
... species
See also
Coextinction
List of extinct animals
The Skeptical Environmentalist
Biodiversity
Unified
neutral theory of biodiversity
Population genetics
External links
A mathematical model for mass extinction
Species disappearing at an ...