Question

What is the most likely explanation for how speciation occurs?

Answer 1

Allopatric speciation, the most common form of speciation, occurs when populations of a species become geographically isolated. When populations become separated, gene flow between them ceases.

Answer 2

Explanation:

• The speciation means no gene flow from parent to offspring. The genetic drift is minor or major leading to speciation.
• The Rapid speciation can cause the condition like polyploidy, leading to a doubling of chromosomes, the progeny is immediately "reproductively isolated from the parent population".
• The four types are allopatric, peripatric, parapatric and sympatric. The scientist "Orator FCook" coined the term in "1906 for cladogenesis". In this process, the progeny does not carry the same gene flow as a parent.