He moved to Case Western University around 1980. He has since vanished from sight. In these, the tracer is radioactively labeled. The driver represents DNA in a 100-fold excess. The mechanism underlying 'sequence sluffing' has not yet been demonstrated.
Many species show nuclear genome size variation.
Sunflower seeds produced from the center of a sunflower head showed apparent lower copy number of mid-repetitive sequence elements, perhaps a slightly differeng GC content and a shorter mitotic cycle than did seed produced from the periphery of the head. Transposons within the McClintock context Barbara McClintock earned a Nobel Prize for her elucidation of transposition. Transposable elements are common genetic characteristics. Read the McClintock paper. McClintock was a cytogeneticist, and could utilize cytogenetic markers as well as genes which affected visible phenotype to identify chromosomally significant events.