2002 AIPMT EvolutionMechanism of Speciation Easy Question 121 of 143 in Evolution

Which of the following is important for speciation : -

A Seasonal isolation
B Reproductive isolation
C Behavioural isolation
D Tropical isolation

The answer is B.

Solution

A new species forms when a population can no longer interbreed with its parent population.
Reproductive isolation (by any barrier, prezygotic or postzygotic) prevents gene flow between the populations, so they evolve independently and become separate species.
Seasonal and behavioural isolation are particular types of reproductive isolation.
So reproductive isolation is important for speciation.

Concept Reproductive isolation leads to new species

Evolution in past papers

143 questions from this chapter have appeared across 27 exam years.