Epigenetic regulation of transposable elements in the plant kingdom which allows for self-copying) within the coding of the transposon defines class I elements as autonomous or non-autonomous. Class I transposons can take the form of: Curiously, retrotransposons have been discovered to be the predominant form of transpositional element in plants with large genomes, such as maize and wheat, potentially indicating rapid success of this class of transposon in the creation of hybrids, such as wheat, peppermint and, in the distant past, maize. Plant hybridization often creates polyploids, with double, triple, quadruple or more the number of chromosomes present in the parent generation. Polyploid hybrids seem to be particularly susceptible
MTV Video Music Award for Quadruple Threat of the Year old format in 2008, though, this category did not come back. MTV Video Music Award for Quadruple Threat of the Year The MTV Video Music Award for Quadruple Threat of the Year was introduced in 2007, as the VMAs were revamped that year and a few new categories were introduced to the show. This award was peculiar for the MTV Video Music Awards, though, for (like Best Artist Website in 1999) it did not reward music nor music videos. Instead, the category awarded musical artists who excelled in at least three other areas beside their music career, such as acting,