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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....
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- Spring '10