The distance between pr1 and bt1 has been found to be 17.5%

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	and	pr₁ Ga₂ bt₁

The data vary round the means 5%, 15% and 40% instead of the expected 50%.