Question

Which of the following is associated with founder and bottleneck effect?

• A. Stabilizing selection
• B. Directional selection
• C. Disruptive selection
• D. Genetic drift
• E. Convergent evolution

Answer 1

The correct option is D Genetic drift

Selection, which can effect any phenotypic trait can also be selectively pressurized by any aspect of the environment. Selection therefore can be classified according to the effect on the trait as stabilizing, disruptive, directional and univariate. One such ecological phenomena is the population bottle neck effect which occurs when there is a disaster thereby reducing a population to a small handful and leaving smaller variation among the surviving individuals. Similarly, founder effect occurs when few members from original population starts off a new colony with small size, and reduced genetic variation. These two phenomena are associated to what is called as genetic drift.