7. Albino seedlings.
A series of nine albino mutants characterized by a complete lack of both chlorophyll and beta‑carotene, a deficiency of carotinoid pigment in the endosperm and a tendency to premature germination were intercrossed to test for allelism. Two of these tested proved to be allelic to the others and were eliminated. Data obtained from twenty of the possible twenty‑one intercrosses between the remaining seven indicate that six of the seven genes are probably non allelic with one combination yet to be tested.
D. S. Robertson and E. G. Anderson