Dia means opposite and kinesis means insertion. At this stage the chromosomes are shorter and thicker. The maximum marginalization of kiazmata occurs. Chromatids cannot be identified separately due to the accumulation of matrix on each chromosome in bivalents. Bivalents move from the center of the nucleus to the periphery. At this point the exchanged part is visible through the crossover. Towards the end of this stage, the nucleolus disappears and the nuclear envelope is removed.