TABLE 7.
Third chromosome pairing in wild-type andc(3)G68 mutants
| No. of foci
|
||||||
|---|---|---|---|---|---|---|
| Probe | 1 | 2 | 3 or 4 | Multiple foci (%) |
Average distance between foci (μm)a |
|
| +/+ | M21 | 13 | 2 | 13.3 | 0.51 (0.01)b | |
| c(3)G68 | M21 | 6 | 5 | 3 | 57.1 | 1.47 (0.55) |
| +/+ | K23 | 10 | 5 | 33.3 | 1.0 (0.81) | |
| c(3)G68 | K23 | 1 | 2 | 1 | 75.0 | 1.37 (0.53) |
| +/+ | N13 | 29 | 10 | 25.6 | 0.66 (0.13) | |
| +/+c | N13 | 75 | 2 | 2.6 | ND | |
| +/+d | N13 | 21 | 2 | 8.7 | ND | |
| c(3)G68 | N13 | 12 | 15 | 2 | 58.6 | 1.92 (2.00) |
| c(3)G68c | N13 | 59 | 27 | 7 | 36.6 | ND |
| c(3)G68d | N13 | 16 | 7 | 4 | 40.7 | ND |
| +/+ | K7 | 18 | 1 | 5.3 | 0.62 (0.12) | |
| c(3)G68 | K7 | 7 | 3 | 30.0 | 2.13 (0.42) | |
Probes: BACR48M21 (86D1-E2), M21; BACR48K23 (89A1-5), K23; BACR22N13 (96F3-11), N13; and BACR48K07 (98E1-F2), K7. ND, not determined.
a
See materials and methods for how these distances were measured.
b
Standard deviation in parentheses.
c
Nurse cells.
d
Prepachytene cells were defined as those in the germarium that lacked ORB or C(3)G staining. These could be cells within a 16-cell cyst very early in region 2a or in region 1 and thus truly premeiotic.