Question

How does a population become ‘founders’ of a new species? [AI 2012C]
Or
When does a species become founders to cause founder effect? [Foreign 2010]

Answer 1

Answer:

When a few members or a small group of members from a certain population invades a new geographical region they may have a different type of or changed allele frequencies from that of the original drifted population, they become the founders of new species and the effect is called as the founder's effect

Answer 2

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the original drifted population becomes found us and the effect is called founder effect