AP BIOLOGY

Detailed explanation-1: -Prezygotic isolation prevents the fertilization of eggs while postzygotic isolation prevents the formation of fertile offspring. Prezygotic mechanisms include habitat isolation, mating seasons, “mechanical” isolation, gamete isolation and behavioral isolation.

Detailed explanation-2: -A reproductive barrier prevents organisms of different species from reproducing with each other. For example, a dolphin and a shark cannot create offspring due to reproductive isolation.

Detailed explanation-3: -Reproductive isolation can be either prezygotic (barriers that prevent fertilization ) or postzygotic (barriers that occur after zygote formation such as organisms that die as embryos or those that are born sterile).

Detailed explanation-4: -Gametic incompatibility is one of the mechanisms of reproductive isolation. It is based on species-specific molecular interactions that prevent heterospecific fertilization.

Detailed explanation-5: -Reproductive Isolation of Species: Prezygotic Mechanisms Five different mechanisms of preventing fertilization of an egg by a sperm of a different species are: spatial isolation. temporal isolation. mechanical isolation.