Speciation160-page7 - successful • The gametes cannot...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Methods of Speciation - 7 Post-Mating Reproductive Barriers There are a number of post-mating reproductive barriers that prevent development or successful survival of offspring and serve as isolating mechanisms that keep species separated. The reverse can also be true. If such mechanisms do not prevent isolation, and result in fertile hybrids, we may have just one species. Some post-mating isolating mechanisms include: Gametic Isolation: Mating (copulation) may occur but fertilization is not
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: successful • The gametes cannot fuse or are not chemically compatible. • The sperm cannot survive in the female reproductive tract. • The zygote cannot develop if fusion does occur. Non-viable Hybrid: Even if gametes fuse, the offspring can be weakened, and may not survive. There are four ranges of leopard frogs in North American, separated by mating behaviors and incompatibility of embryos if behavior mechanisms are overridden....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online