Two researchers experimentally formed tetraploid frogs by fertilizing diploid eggs from rana porosa brevipoda with diploid sperm from rana nigromaculata. when they mated these tetraploid frogs with each other, most of the offspring that survived to maturity were tetraploid, with chromosome sets of both diploid parent species. based on these results, if this type of tetraploid formed in the wild, what would be the result? (y. kondo and a. kashiwagi. 2004. experimentally induced autotetraploidy and allotetraploidy in two japanese pond frogs. journal of herpetology 38(3): 381-92.)