Heterozygotes are WT and segregate WT, Lon males, lots of dead eggs, and Dpys. The Dpys should give all dead embryos at all temperatures. Approximately 60% of these dead embryos make excess mesoderm at the expense of endoderm, due to an E to MS fate transformation. Embryonic lethality is 100% penetrant for or46.

Heterozygotes are WT and segregate WT, Lon males, lots of dead eggs, and Dpys. The Dpys should give all dead embryos at all temperatures. Approximately 60% of these dead embryos make excess mesoderm at the expense of endoderm, due to an E to MS fate transformation. Embryonic lethality is 100% penetrant for or10.

Heterozygotes are WT and segregate WT, Uncs with a protruding vulva, Long males and dead eggs. Uncs give only embryonic lethals which lack gut and make excess mesoderm (E adopts an MS-like fate). or10 is a recessive maternal-effect embryonic lethal. Zygotic phenotype of or10 is protruding vulva and slight uncoordination.