tetrads from rt 's that involve a chromosome tip resemble those from it 's , as do tetrads from intercrosses between partially overlapping rt 's that involve identical chromosome arms.-because viable duplications and other aneuploid derivatives regularly occur among the offspring of rearrangements such as insertional translocations , care must be taken in selecting stocks , and original strains should be kept for reference .
C0008633
chromosome
C0449721
chromosome arms