Question

The blood group B is almost absent in Native Americans, whose ancestors arrived in very small numbers about 10,000 years ago. Which factor is responsible for this phenomenon?
A)migration effect



B)founder effect



c)bottleneck effect

Answer 1

Answer:

B) Founder effect

Explanation:

Migration effect:

In this effect population moves from place to place is search of job shelter or some other reason. In this effect population migrates to increase their survival chances.

Founder effect:

This is the term used to describe population genetics in which genetic variation get lost with the establishment of new population. This new population is established by individuals with small number from large population.

Bottleneck effect:

In this affect population size dramatically decreased because of natural disaster. The remained members of the community were just lucky enough to survive from this natural disaster.

Best Answer of The Question:

B) Founder effect because this effect occurs in small populations and causes genetic variation.

Answer 2

B because it results from there being less genetic diversity