Answer: The correct answer is-
A population with small size
is subjected to genetic drift. Genetic drift can be described as an evolutionary process where a random change occurs in the frequency of a gene variant ( that is called allele) in a population.
Which population is most subject to genetic drift?
Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in
small populations
.
What type of population is affected by genetic drift?
Typically, genetic drift occurs in
small populations
, where infrequently occurring alleles face a greater chance of being lost. Once it begins, genetic drift will continue until the involved allele is either lost by a population or until it is the only allele present in a population at a particular locus.
Which population would be more likely to be affected by genetic drift?
Small populations
tend to lose genetic diversity more quickly than large populations due to stochastic sampling error (i.e., genetic drift). This is because some versions of a gene can be lost due to random chance, and this is more likely to occur when populations are small.
Where is genetic drift most likely to occur?
Genetic drift is likely to occur more rapidly on
an island where smaller populations are expected to occur
. Small populations are more susceptible to the forces of genetic drift. Large populations, alternatively, are buffered against the effects of chance.
What is genetic drift examples?
Genetic drift is
a change in the frequency of an allele within a population over time
. … A population of rabbits can have brown fur and white fur with brown fur being the dominant allele. By random chance, the offspring may all be brown and this could reduce or eliminate the allele for white fur.
What are the two types of genetic drift?
There are two major types of genetic drift:
population bottlenecks and the founder effect
. A population bottleneck is when a population’s size becomes very small very quickly.
Is genetic drift natural selection?
Genetic drift affects the genetic makeup of the population but, unlike natural selection,
through an entirely random process
. So although genetic drift is a mechanism of evolution, it doesn’t work to produce adaptations.
Is genetic drift evolution?
Genetic drift is
a mechanism of evolution
. It refers to random fluctuations in the frequencies of alleles from generation to generation due to chance events. Genetic drift can cause traits to be dominant or disappear from a population. The effects of genetic drift are most pronounced in small populations.
What is a potential negative effect that can result from inbreeding?
Inbreeding results in
homozygosity
, which can increase the chances of offspring being affected by deleterious or recessive traits. This usually leads to at least temporarily decreased biological fitness of a population (called inbreeding depression), which is its ability to survive and reproduce.
When nonrandom mating occurs in a population?
When a population interbreeds, nonrandom mating can sometimes occur because one organism chooses
to mate with another based on certain traits
. In this case, individuals in the population make specific behavioral choices, and these choices shape the genetic combinations that appear in successive generations.
What is difference between genetic drift and change due to natural selection?
There is no difference
.
How can the population in genetic drift affects its survival?
Genetic drift
reduces genetic variability of a population by decreasing the size of the population
. The change in population size and variability often leads to new species and unique populations. Populations of organisms are constantly changing and adapting to their environment.
What are the 5 factors of evolution?
There are five key mechanisms that cause a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by:
mutation, genetic drift, gene flow, non-random mating, and natural selection
(previously discussed here).
How do you test for genetic drift?
to test for genetic drift. According to the theory of genetic drift,
the variance in allele frequency across the populations should increase by a factor of p(1 –p)/2N each generation
, where p is the current frequency and N is the population size.
Is natural selection random?
The genetic variation on which natural selection acts may occur randomly, but
natural selection itself is not random at all
. The survival and reproductive success of an individual is directly related to the ways its inherited traits function in the context of its local environment.
