Complex sentence: The total complement of genes in an organism or cell is known as its genome, which may be stored on one or more chromosomes; the region of the chromosome at which a particular gene is located is called its locus.
Split into simpler sentences: The total complement of genes in an organism or cell is known as its genome, which may be stored on one or more chromosomes. The region of the chromosome at which a particular gene is located is called its locus.