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