Phillips and Wang (MGCNL 46:123) reported 13 interchanges with a breakpoint in the satellite of chromosome 6. Table 1 lists the position of the break within the satellite for 12 of the 13 interchanges. The satellite region of these stocks consists of three prominent chromomeres. The cytology of the interchange homozygotes enabled the precise placement of the chromosome 6 breakpoint for nine interchanges. The cytological analysis of the other three was more difficult, allowing only a tentative placement of the satellite-interchange breakpoint.
R. L. Phillips and A. S. Wang
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