Define and explain: Gene and Split gene.

(N/A) Gene: $A$ gene is defined as the functional unit of inheritance. It is a segment of $DNA$ that codes for a polypeptide,$rRNA$,or $tRNA$ molecule.
Split gene: In eukaryotes,the coding sequences or expressed sequences are defined as exons. Exons are interrupted by introns or intervening sequences that do not appear in mature or processed $RNA$. This arrangement of genes containing both exons and introns is known as a split gene,which is a characteristic feature of eukaryotic $DNA$.