6. The distance between pr1 and bt1 has been found to be 17.5%. The gametophyte factor ga2 is located between pr1 and bt1 about 12.8 units from pr1 and 4.7 units from bt1. The amount of elimination in Ga/ga heterozygotes has been found to vary and has been studied in both types of heterozygotes, i.e.
|Pr1 Ga2 Bt1||and||Pr1 ga2 Bt1|
|pr1 ga2 bt1||pr1 Ga2 bt1|
The data vary round the means 5%, 15% and 40% instead of the expected 50%.