Multiple choice

Due to the activity of supplementary genes, the colour of glume in Sorghum is changed to

  1. purple

  2. red

  3. brown

  4. white
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Sorghum, supplementary genes control glume color - gene C produces color precursor while gene R converts it to red pigment. The 9:3:4 ratio arises from this interaction where both dominant alleles are needed. Without functional R, the color may appear different or absent, but red specifically results when both genes function.

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