Despite the obscuration of imperfect dominance, polydactylism in poultry proves itself to be a unit-character that segregates.
The inheritance of eye color serves as a paradigm of the method of inheritance of any unit-character.
Tallness in the pea is a unit-character, and the gametes in which it is represented are said to contain the factor for tallness.
First of all, we find useful the principle of the unit-character.
The factor for this or that unit-character is either present in the gamete or it is not present.