Hybrid. This mutation is caused by gene shuffling between Gnb5 and Myo5a. The shuffling combines the promoter of the first two exons of Gnb5 with the C-terminal exons of Myo5a. Flailer homozygotes express transcripts of three genes: wild-type Gnb5, wild-type Myo5a and the flailer hybrid gene. (J:61324)