12. Further data on chromosome 1 translocations. In my paper on zl (Genetics 1939, p. 382), in which many previously unpublished data from Anderson were used, it was shown that T1-5b, 1-5c, and 1-3a have their breaks between P and br, and that the T1-2c break is near sr. A few further data are now available, and are presented in the accompanying table.
| F1 genotype | 0 | 1 | 2 | 1, 2 | Total |
| T1-2c + + | 6251 | 23 | 2019 | 0 2 | |
| + sr P | 113 | 5 | 38 | 2 | 159 |
| 3.2% | 24.0% | 1.3% | |||
| + p + | 99 112 | 17 22 | 1 5 | 0 2 | |
| sr + T1-9c | 211 | 39 | 6 | 2 | 258 |
| 15.1% | 2.3% | 0.8% | |||
| P + br | 30 21 | 1 4 | 12 17 | 0 0 | |
| + T1-9c + | 51 | 5 | 29 | 0 | 85 |
| 5.9% | 34.1% | ||||
| T1-9c + + | 16 22 | 24 21 | 3 8 | 3 0 | |
| + br an | 38 | 44 | 11 | 3 | 96 |
| 45.8% | 11.5% | 3.1% | |||
| + + T1-5b | 59 40 | 28 19 | 8 12 | 3 1 | |
| sr p + | 99 | 47 | 20 | 4 | 170 |
| 27.6% | 11.8% | 2.4% | |||
| p + br | 52 60 | 11 8 | 16 18 | 4 1 | |
| + T1-5b + | 112 | 19 | 34 | 5 | 170 |
| 11.2% | 20.0% | 2.9% | |||
| T1-3a + + | 75 54 | 29 53 | 13 15 | 12 3 | |
| + br an | 129 | 81 | 29 | 15 | 253 |
| 32.0% | 11.1% | 5.9% | |||
| T1-9b + + | 26 35 | 1 2 | 10 15 | 0 0 | |
| + br bm2 | 61 | 3 | 25 | 0 | 89 |
| 3.4% | 29.2% | ||||
Although these data are not wholly consistent, they indicate that T1-2c is near sr and to its left, that T1-9c is near P and to its right, and that T1-9b is near br and probably to its left.