2. Long-inversion on chromosome 2 - The inversion is well out toward the end of each arm, thus inverting four-fifths or more of the chromosome. Tests place the left break between gl2 and B, the right break far beyond v4 but in the v4-ch interval. In the homozygous inversion the map order is lg-gl2-v4-B-ch. Data on map distances are as follows:
| Total | Crossovers | Percent | |
| lg-v4 | 851 | 321 | 37.7 |
| gl2-v4 | 828 | 303 | 36.6 |
| v4-B | 2425 | 1006 | 41.5 |
| B-ch | 1205 | 300 | 24.9 |