Detachment by crossing over with a Y chromosome relatively frequent.
Valencia, Muller and Valencia.
Induced on: In(1)scS1+dl-49.
regularly X ray induced either by exchange between the proximal heterochromatin of the normal sequence and the distal heterochromatin of In(1)scS1 or by sister-strand union in one of the heterochromatic elements accompanied by normal euchromatic exchange.
Essentially a reversed acrocentric in which the proximal element contains In(1)dl-49. C(1)VM, + - In(1)scS1 In(1)dl-49.