Figure 7. Interaction of Variegating Genes with Heterochromatin on Other Chromosomes.

All three lines were examined to see how often variegating genes interacted with heterochromatin on their own and other chromosomes.

(A) Close-up of In(1)rst³ nucleus showing variegating gene interaction with heterochromatin on its own chromosome.

(B) Close-up of In(1)rst³ nucleus showing variegating gene interaction with heterochromatin on a different chromosome.

(C) In(1)rst³ nucleus showing variegating gene interaction with heterochromatin on both its own and another chromosome.

(D–F) Bar plots of interaction frequencies of variegating genes with their own heterochromatin and that found on other chromosomes. A distance of 1.0 μm was chosen as the maximum distance for interaction to occur.