What’s on the DNA & Genes poster
A definition and 6 facts worth remembering.
A double helix of paired bases — A with T, C with G — coiled into 46 chromosomes. Segments of it, called genes, code for proteins.
- Four bases: adenine, thymine, cytosine, guanine.
- A pairs with T; C pairs with G. Always.
- 46 chromosomes in 23 pairs, one of each pair from each parent.
- About 20,000 protein-coding genes.
- Three bases — a codon — specify one amino acid.
- Under 2% of human DNA codes for protein.
- Chromosomes — 46
- Genes — ~20,000
- Base pairs — ~3 billion
- A mutation changing one base can change one amino acid — which is what causes sickle…
DNA is transcribed to RNA, then translated to protein. That one-directional flow is the central dogma of biology.
Questions about the DNA & Genes poster
- What’s on the DNA & Genes poster?
- A definition and 6 facts worth remembering. A double helix of paired bases — A with T, C with G — coiled into 46 chromosomes. Segments of it, called genes, code for proteins. Four bases: adenine, thymine, cytosine, guanine.; A pairs with T; C pairs with G. Always.; 46 chromosomes in 23 pairs, one of each pair from each parent.; About 20,000 protein-coding genes.; Three bases — a codon — specify one amino acid.; Under 2% of human DNA codes for protein.; Chromosomes — 46; Genes — ~20,000; Base pairs — ~3 billion; A mutation changing one base can change one amino acid — which is what causes sickle…. DNA is transcribed to RNA, then translated to protein. That one-directional flow is the central dogma of biology.
- Who is the DNA & Genes poster for?
- DNA & Genes belongs to the Body & health section rather than to a school year, because health is not something one grade owns. Anyone learning anatomy can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the DNA & Genes poster?
- DNA is the instructions. A gene is one instruction. A protein is what gets built. A wall chart earns its place by being glanceable from where the work is happening, so DNA & Genes belongs on the wall where that health work actually happens, within glancing distance, rather than filed away.
- What other posters go with DNA & Genes?
- Blood, Blood Types and The Body Systems sit alongside DNA & Genes in the Body & health section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.BloodBlood TypesThe Body Systems
- Is the DNA & Genes poster free to download and print?
- Yes. DNA & Genes downloads as a free PDF with no account, no email and no watermark, like everything else in the Body & health section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the DNA & Genes poster print at?
- DNA & Genes is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of DNA & Genes loses nothing.Printing guide
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