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.
How is an F′ factor different from an F factor?
Meiotic nondisjunction is much more likely than mitotic nondisjunction. Based on
In fruit flies, curved wings are recessive to straight wings,
What is an advantage and a disadvantage of this repair system?
Explain the type of speciation (allopatric, parapatric, or sympatric
The raw material for evolution is random mutation. Discuss whether or
With regard to the timing of conjugation, explain why the recipient
A woman who is heterozygous, Bb, has brown eyes;
A recessive allele in mice results in an unusally long neck.
Why is an antibody used in this experiment? From