In this article we will discuss about Reproductive Isolation :- Prezygotic isolation and Postzygotic isolation
- Prevention of inter breeding between the population of two different or closely related species
- Reproductive isolation was explained by stebbian
- Two types reproductive isolation are
- Prezygotic isolation
- Postzygotic isolation
1. Prezygotic isolation
- Prevention of mating and the formation of zygote
- Temporal isolation: Due to difference in breeding seasons of two species
- Ecological isolation: Due to different habitats of two species
- Behavioral isolation: Due to different sexual or coitus behavior of two species
2. Postzygotic isolation
- The organisms mate but no offspring are produced
- In viability: Zygote fails to develop
- Sterility: Adults are sterile and do not produce gametes
- Hybrid Breakdown: Sometimes inter specific mating produces a hybrid, but progeny is weak, abnormal or sterile.
