In an small town, most people have brown hair and only a few have red hair.

A few friends discover an island and decide to move to the island, bringing about 20 others to live on the island as well. Most people that happend to leave are left-handed.

On the new island, now 70% of the population is left-handed.



This is an example of:

a Not enough information
b Natural Selection
c Genetic Drift: Bottleneck
d Genetic Drift: Founder's Effect