Heterozygous Heterochromatin in Giemsa C-Banded Chromosomes of Clogmia Albipunctata (Telmatoscopus Albipunctatus) (Diptera: Psychodidae)

SUMMARY

The mitotic and meiotic chromosomes of the moth fly Cloynia albipunctata were analyzed using the Giemsa C-banding technique. Heterozygous centrometric bands were observed in four pairs of chromosomes, two of which seem to be exclusive of the male sex, showing the same heterozygous condition at the male meiosis. They are probably carrying the sex determining factors in a complex system of sex chromosome determination. This system is different from the one found in the polytene chromosomes of a Brazilian strain of the same species both in type and in location of the sex determining factors.