POSTZYGOTIC BARRIERS
Postzygotic barriers occur when different species mate, leading to the prevention of viable and fertile hybrids. These barriers include reduced hybrid viability due to genetic incompatibility, affecting embryonic development. Understanding postzygotic barriers is crucial in comprehending species evolution and biodiversity.
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Presentation Transcript
POSTZYGOTIC BARRIERS Anushka Kumar Dennison Ocampo Karen Luis Sidrah Khan Anna
Assertion Postzygotic barriers are when a sperm cell and a cell from two diferrent species mate and are usually prevent hybrid zygote from developing into a viable, fertile adult.
eXample Horse + Donkey= Mule(hybrid).
Explanation There different are different types of Postzygotic Barriers: Reduced hybrid-when prezygotic barriers are crossed and hybrid zygotes are formed, genetic incompatibilty between the two species may abort development of the hybrid at some embroyonic stage.
Significance Without postzygotic barriers there would be a viable , fertile adult. If it wasn t for postzygotic barriers then the horse and the donkey wouldn t be able to have the mule.
