Zusammenfassung der Ressource
Population
- when changes within occur
- Microevolution
- evolutionary change within
a species or small group of
organisms, especially over
a short period.
- when the diversity of, is studied, is called
- Population genetics
- Population genetics
is the study of the
distribution and
change in frequency
of alleles within
populations
- involves
- gene pool
- which refers to
- allele frequency
- the relative frequency of an allele
(variant of a gene) at a particular
locus in a population, expressed
as a fraction or percentage.
- the stock of
different genes in
an interbreeding
population.
- Gene Flow
- the transfer of alleles
or genes from one
population to another.
- genetic drift
- which can be typed as
- bottleneck effect
- Population
bottlenecks occur
when a population's
size is reduced for at
least one generation.
- founder effect
- the reduced genetic
diversity that results when
a population is descended
from a small number of
colonizing ancestors
- variation in the
relative frequency
of different
genotypes in a small
population, owing to
the chance
disappearance of
particular genes as
individuals die or do
not reproduce.
- types of natural
selection such as
- stabilizing selection
- a type of natural selection
in which genetic diversity
decreases and the
population mean
stabilizes on a particular
trait value.
- directional seletion
- which an extreme
phenotype is
favored over
other
phenotypes,
causing the allele
frequency to shift
over time in the
direction of that
phenotype.
- disruptive selection
- describes
changes in
population
genetics in
which extreme
values for a trait
are favored over
intermediate
values.
- Sexual Selection
- natural selection
arising through
preference by one
sex for certain
characteristics in
individuals of the
other sex.
- can be in
- Hardy Weinberg Equilibrium
- which is related to
- Hardy Weinberg Principle
- Mathematical law stating that the gene
frequencies in a population remain stable if
evolution does not occur due to nonrandom
mating, selection, migration, and genetic
drift..
- states that allele and
genotype frequencies in a
population will remain
constant from generation to
generation in the absence of
other evolutionary influences.
- may become
- Reproductively Isolated
- the situation where different
species may live in the same area,
but properties of individuals
prevent them from interbreeding.
- which may involve
- inbreeding
- breed from closely
related people or
animals,
especially over
many generations.
- non-random mating
- another type of
which is called
- assortative mating
- a mating pattern and a form
of sexual selection in which
individuals with similar
genotypes and/or phenotypes
mate with one another more
frequently than would be
expected under a random
mating pattern.
- when the
probability that
two individuals
in a population
will mate is not
the same for all
possible pairs
of individuals.
- whose traits may be
- polygenetic
- having more than one origin or source.
- A group of organisms
of one species that
interbreed and live
in the same place at
the same time