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What are the prezygotic and postzygotic barriers

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What are the prezygotic and postzygotic barriers for these situations?

1) Several species of frogs of the genus Rana can live in the same pond. Sometimes hybrid zygotes form, but these fail to develop.

2) Some species of fruit flies in the genus Drosophila are isolated because of incompatibility of their genitalia.

Reference no: EM132573491

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