MEIOTIC STUDY ON SUPERNUMERARY MICROCHROMOSOMES OF RED FOX (VULPES VULPES)

Numerical variation of microchromosomes between animals has been confirmed for somatic cells and shown in meiotic material. Nucleolar organizers on the supernumeraries were demonstrated by attachment of nucleoli at the heterochromatin of accessory bivalents. Two types of supernumeraries may segregate in the fox, one of which probably has two structural forms. Precocious separation of accessories was noted at diakinesis.