3. The engrailed gene of Drosophila plays an important role in determining the polarity of segments in the embryo. The gene also plays an important role in the growth of axons of neurons in the brain. From this information, it can be said that that the engrailed gene is
A. completely penetrant.
B. polygenic
C. pleiotropic
D. A and C
E. B and C
Option D. Completely penetrant and pleiotropic
It is evident from the example that
Therefore option D is the correct answer
Polygenic trait is a trait/phenotype which is determined by many genes. Therefore option C and E are wrong
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