C(1;YL)1 progenitor marked with y cv v f car Thought to result from an euchromatic exchange between the C(1;YL)1 chromosome and the acentric ring formed by dyscentric exchange between the distal and proximal heterochromatin of the long arm of C(1;YS)1, In(1)sc8LENR.
C(1)TA.YL + - +., y - y.KL; original line segregating for cv, v, f, and car.