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Sagot :
The examples as prezygotic barriers - One bird species prefers open areas, whereas another bird species prefers wooded areas. One frog species mates in the spring whereas another frog species mates in the summer.
The examples as postzygotic barriers - horse and donkey male to produce sterile mule. Individuals from two different species mate but the resulting embryo dies before birth.
What are prezygotic barriers?
Prezygotic barriers hinder members of different species from mating and giving birth to a zygote, a single-celled embryo. Spatial isolation, temporal isolation, mechanical isolation, gametic isolation, and behavioral isolation are the five basic types of prezygotic barriers to reproduction. These barriers occur before mating or formation of zygote.
What are postzygotic barriers?
Postzygotic barriers include the creation of hybrid individuals that do not survive past the embryonic stages ( hybrid unviability ) or the creation of a hybrid that is sterile and unable to produce offspring ( hybrid sterility).
Hybrid Zygote Abnormality, Hybrid Infertility and Low Hybrid Viability are some examples of postzygotic barriers of reproduction. These barriers occur after mating or formation of zygote.
The examples as prezygotic barriers - One bird species prefers open areas, whereas another bird species prefers wooded areas. One frog species mates in the spring whereas another frog species mates in the summer.
The examples as postzygotic barriers - horse and donkey male to produce sterile mule. Individuals from two different species mate but the resulting embryo dies before birth.
To know more about prezygotic and postzygotic barriers, check out:
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