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
Owned-and-operated television stations in the United States (channel 2) to Fox. CBS then unsuccessfully sought to affiliate with other stations in the market before it eventually purchased low-rated ethnic independent WGPR-TV (channel 62) and changed the station's callsign to WWJ-TV (a callsign once used by one of the stations that CBS approached for an affiliation, WDIV-TV) in 1995. The station continues to receive low ratings, and after a brief attempt at running an 11:00 p.m. newscast from 2001 to 2002 that was produced by sister station WKBD-TV (which voluntarily shut down its news department shortly afterward to enter into a short-lived news share agreement with WXYZ-TV), was