Stock Illustration - Human chromosomes - each chromosome consists of a dna double helix bearing a linear sequence of genes, coiled and recoiled around aggregated proteins. their number varies from species to species: humans have 22 pairs plus the two sex chromosomes (two x ch. Clipart Drawing gg66646690
Your satisfaction is important to us. If you are unsatisfied for any reason, we offer a 100%
money back guarantee for up to 30 days after your purchase.