Friday, July 23, 2010

Is geographic isolation and reproductive isolation the same thing?

are they the same thing?Is geographic isolation and reproductive isolation the same thing?
No. Geographic isolation can be a type of reproductive isolation. Geographic isolation refers to the separation of two populations by physical boundaries, such as rivers, mountains, etc. Reproductive isolation occurs when two populations no longer produce viable offspring. This can be due to geographical isolation (they can't mate with each other if they can get together) or due to other factors such as behavioral differences.Is geographic isolation and reproductive isolation the same thing?
Geographic isolation is when two populations are separated which prevents them from reproducing.





Reproductive isolation is something biologically preventing fertilization. It could be sterile sperm, bad chromosomal compatibility, anything.





They both are prezygotic barriers which means they prevent the production of an offspring, even as a zygote.





They both have to do with stopping reproduction but are different things.





BTW the first poster is wrong about reproductive isolation. Mating at different times of the day is an example of temporal isolation and having to do with behavior is called behavioral isolation.
Geographic isolation is when two populations cannot mate due to being at different locations and do not have the means to get to the other. For instance if one population was on an island and another was on the mainland.





Reproductive isolation is when two species cannot mate with each other which separates them. An example would be a dog and a cat.





Therefore, they are different.
They are both isolation, but due to different causes. Geographic isolation means a species is separated by things like mountains or rivers. Reproductive isolation means that a species is separated by developing different behaviors, like mating at night vs. day, or having specific behaviors.

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