chromosomes computer screen |
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| navigate by keyword : acid chromosome chromosomes computer deoxyribonucleic dna double genes genetic genetics health healthcare helix human laptop material medical medicine microscopic screen sequence |
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| 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 chromosomes in females, one X and one Y in males) |
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