The region of the chromosome or, more specifically, the length of the DNA molecule, which has a particular function is called _.

Explanation

The gene is the basic physical and functional unit of heredity. It consists of a specific sequence of nucleotides at a given position on a given chromosome that codes for a specific protein. A kinetochore is a disc-shaped protein structure associated with duplicated chromatids in eukaryotic cells where the spindle fibers attach during cell division to pull sister chromatids apart. In genetics, a locus is a specific, fixed position on a chromosome where a particular gene or genetic marker is located. An allele is one of two, or more, forms of a given gene variant.