(7) Coenocytism with three synchronized nuclei. (8) A PMC contains probably more than one hundred chromosomes (their high density make an accurate count impossible) (9) A PMC contains more than 28 chromosomes, showing multipolar division and lagging chromosomes. (10) A PMC of the T. aestivum x P. huashanica F₁ hybrid, showing 2 quadrivalents (arrow a), 3 ring bivalents (arrow b), 3 rod bivalents (arrow c) and 64 univalents.