10. Locus of knotted. - In the News Letter of March 26, 1938 (p. 5), Bryan reported Kn 26 units from br and 24 units from bm2. These data suggest that Kn is between an and gs. The few data obtained last summer are in agreement with this indication, as follows:
| F1 genotype | 0 | 1 | 2 | 1, 2 | Total |
| + Kn + | 49-32 | 9-14 | 0-8 | 2-1 | |
| an + gs | 81 | 23 | 8 | 3 | 115 |
| 20.0% | 7.0% | 2.6% | |||
| + Kn + | 56-44 | 26-7 | 24-14 | 7-0 | |
| an + bm2 | 100 | 33 | 38 | 7 | 179 |
| 18.6% | 21.3% | 3.9% | |||
If, as is suggested above, Kn and Ts3 are between an and gs and Ts6 near bm2, Kn should show much closer linkage with Ts3 than with Ts6. This is borne out only in part by the following back-cross data.
| XY | Xy | xY | xy | |||
| Kn Ts3 | 3 | 9 | 16 | 2 | = | 16/30 = 16.7% |
| Kn Ts6 | 8 | 27 | 47 | 13 | = | 21/95 = 22.1% |