allelomorph

Allelomorph (one another form), one of a pair of factors which are alternative to each other in Mendelian inheritance.

The factor for this eye color is another allelomorph of white.

If the normal allelomorph is thought of as the positive character, which one of the mutants is due to its loss or to its absence?

If each is produced by a loss it must be a different loss that acts as an allelomorph to the other loss.

Since eosin is an allelomorph of cherry, it should be expected to give with sable the same cross-over value as did cherry.