Homozygous larvae show an increase in the number of hemocytes compared to control larvae.
Mutant animals exhibit a marked enlargement of the first lobes of the lymph gland, which occasionally contain melanised hemocytes. In addition hemocytes are larger and more heterogeneous in size and shape than those found in wild-type. The proportion of lamellocytes is greatly increased compared to wild-type. Many of the larger rounder hemocytes in the lymph glands and in circulation (up to 10% of all hemocytes) contain two nuclei.