Small, two-armed chromosome in mitotic metaphase. Survives in combination with C(1)DX and therefore carries bb+.
Muller.
Derived from an exchange between proximal YS and the proximal Xhet of the pericentric inversion, In(1LR)scV1. and therefore has y+ and ac+ on the other side of the centromere from YS.
Induced in: male.
pch+ - scV1 bb+ KS; tentative.