female sterile | recessive
lethal - all die during embryonic stage | maternal effect | recessive
some die during embryonic stage | recessive | maternal effect | recessive
embryo | embryonic stage 5 | maternal effect
embryonic/first instar larval cuticle | maternal effect
Eggs derived from homozygous females form a syncytial blastoderm and many embryos begin to cellularise. Cellularisation is irregular. Gastrulation takes place but is usually very abnormal. The embryos form pieces of cuticle.