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Q.
Polycistronic messenger $ RNA (mRNA)$ usually occurs in
Molecular Basis of Inheritance
Solution:
When a particular gene codes for a $mRNA$ strand it is said to be monocistronic or monogenic. When several genes (cistrons) are transcribed into a single $mRNA$ molecule, it is described as polycistronic or polygenic. Prokaryotic $mRNA$ are polycistronic.