Both meiosis I and II proceed normally in hemizygous females. Hemizygous females are sterile. Only a small sperm aster forms in many eggs derived from hemizygous females. There is no apparent female pronuclear specification or evidence of migration towards the male pronucleus. Triplo- or tetra-fusion of the polar bodies is common. The gonomeric division is not completed in eggs of hemizygous and heterozygous females.
Based on the extent of embryogenesis in eggs derived from hemizygous females, the following αTub67C alleles can be ranked from strongest to weakest as follows: αTub67CRE3.1 = αTub67CRE3.2 = αTub67CRE3.3 > αTub67CRE2.1 = αTub67CRX2.2 = αTub67CRX2.1 = αTub67CRE1.1 = αTub67CRX3.1 > αTub67CRX1.1 = αTub67CRP3.1 = αTub67CRP1.1. Transplantation experiments in which αTub67CRE2.1/αTub67CRE3.1 germ line cells are transplanted into ovoD1/+ females, and normal germ line cells are transplanted into αTub67CRE2.1/αTub67CRE3.1 females indicate that αTub67C functions only in the female germ line.