What is a gene defined as in genetics?

What is a gene defined as in genetics?
  1. A segment of DNA that codes for tRNA or rRNA
  2. A unit of inheritance
  3. A segment of DNA that codes for a polypeptide
  4. A DNA sequence coding for a mRNA molecule

Solution

A gene is defined as the functional unit of inheritance in genetics. It is difficult to literally define a gene in terms of DNA sequence.

Asked in: NCERT

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