Acluster of prokaryotic genes under the control of one regulatory sequence is called a(

Operon.

Explanation:

Operon is known as a functional unit of DNA. They also present in viruses, for example bacteriophage. In general words, operon is basically a group of genes under the control of one promoter.

In bacteria genes are often present in a cluster of the chromosomes in which they are transcribed from one promoter or RNA polymerase binding site as a single unit. Under control of single promoter this cluster of gene is known as an operon.

gametes or germ cells are haploid cells (example: sperm and ova) containing only one set (or n) number of chromosomes and autosomal or somatic cells are diploid cells containing 2n number of chromosomes.

oceans

indian ocean

pacific ocean

atlantic ocean

arctic ocean

southern ocean