Polytene chromosomes normal.
Insertion of a copia-like element at coordinate +4kb (coordinates according to FBrf0045027 and FBrf0039003).
Lesion associated with a 14.8 kb insertion between +3.7 and +4.4 kb on the physical map of Notch (Kidd, Lockett and Young, 1983).
Typical Notch except for semi-lethality with Nnd-3.
Demerec, Jan. 1940.