Amino acid replacement: A245T. Nucleotide substitution: G2423A.
Amino acid replacement: A245T.
G8431694A
G2423A
A246T | grk-PA
A245T
Reduction or absence of dorsal appendages (ventralization) with increase in main body egg shell. Micropyle at both ends of eggs, embryos ventralized.
An enlarged mass of mesodermal cells invaginates on the ventral side of the embryo, the enlarged mesoderm is often organised into two ventral furrows. Organisation is lost in later stages of development and a mass of mesodermal cells fills the ventral half of the embryo. Respiratory appendages are fused and shortened and adjacent operculum is reduced.
phenotype of eggs and embryos: mostly intermediate, but can vary from weak to strong
Intermediate grk allele.