determiner

That means that there is a determiner for it which is grouped with other determiners in one of the chromosomes.

Suppose the determiner of a certain character (violet colour of flower in the bean) is located in a chromosome A of this species.

Yahwe is also the determiner of destiny, but he is a rational power behind events.

In a pure variety like the black Andalusians, all the germ cells of each fowl are alike in having this determiner for black color.

Blue eyes are due to the absence of a brown pigment determiner, et cetera.