The right option is; gene
Gene is the feature in a cell that contains the DNA sequence to make a specific protein.
A gene is a unit of heredity, and a component of DNA that is situated on chromosomes that contain the information for protein production. Genes are transferred from parent to offspring, and they carry genetic instructions such as the sequence of amino acids for a specific protein. The alternative forms of genes are called alleles, and there are usually two alleles for a transferred trait. About 20,000 to 25,000 genes are present in humans.