Definition of Bottleneck Effect
When there comes a disaster, the ecosystem undergoes major changes and there is a drastic decrease in the population which can cause a certain type of genetic drift. This genetic drift is termed as bottleneck effect. This disaster may be a natural one or can be caused by excessive human activities. The examples of natural disasters include earthquake and volcanic eruption whereas deforestation, hunting and pollution are caused by human interference.
When a large number of members belonging to a population abruptly die, the genetic variation goes down and hence the allele frequency changes. This significant and sudden reduction in the population leads to bottleneck effect.
View More Genetics Definitions
Related Questions of Genetics
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
A woman who is heterozygous, Bb, has brown eyes;
Explain why familial breast cancer shows a dominant pattern of inheritance in
How is an F′ factor different from an F factor?
With regard to the timing of conjugation, explain why the recipient
The raw material for evolution is random mutation. Discuss whether or
Why is an antibody used in this experiment? From
Explain the type of speciation (allopatric, parapatric, or sympatric
In fruit flies, curved wings are recessive to straight wings,
A recessive allele in mice results in an unusally long neck.
Show All
