Reddit pigment in wheat kernels is an inherited trait. In crosses between we plants with different colonel colors a wide range of colonel color phenotypes is observed among the offspring.
A. Incomplete dominance
B. Multiple alleles
C. Codominance
D. Polygenetic inheritance

The graph suggests polygenic inheritance

Explanation:

A particular characteristic such has color most of the time is not controlled by just one gene but by two or more genes giving rise to a form of polygenic inheritance. The presence of ranges of pigment color phenotypes may also be attributed to number and position of the chiasmata during crossing over relative to the sequence of genes involved. This gives rise to difference combinations possible in the gametes.

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