Chromosome Chromosome A chromosome is a grouping of coiled strands of DNA , containing many genes.
Most multicellular organisms have several chromosomes, which together comprise the genome .
Sexually reproducing organisms have two copies of each chromosome, one from the each parent. This is also defined in Microsoft's Encarta Concise Encyclopedia. To look up that definition, switch to an Encarta window . To return to the previous topic, click on your browser's 'Back' button.