DNA 1: The Double Helix and How Genes Are Read
A ten‑minute visual journey from the discovery of DNA’s double helix to the modern understanding of its code, size, and maternal inheritance.
Chapters
On-screen text
- 0:07 The Shape of Life
- 0:14 The Shape of Life
- 0:31 Franklin’s Photo 51 shows helical DNA Historical record · Rosalind Franklin, Photo 51 (1952), King’s College London
- 0:58 Chargaff’s base‑pair ratios (A=T, G=C) Historical record · Erwin Chargaff, “The composition of nucleic acids”, J. Biol. Chem. 1949
- 1:16 A‑T and G‑C base pairing The Institute's interpretation · Watson & Crick, 1953
- 1:25 Copying the Code
- 1:41 Semi‑conservative replication proved (1958) Historical record · Meselson & Stahl, “The replication of DNA in Escherichia coli”, PNAS 1958
- 1:59 Helix protects DNA The Institute's interpretation · Watson & Crick, 1953
- 2:08 From DNA to Protein
- 2:15 From DNA to Protein
- 2:32 Crick’s adaptor hypothesis (1961) Historical record · Francis Crick, “On protein synthesis”, Symp. Soc. Exp. Biol. 1961
- 2:50 First codon (UUU) identified (1961) Historical record · Nirenberg & Matthaei, “RNA Code”, Proc. Natl. Acad. Sci. 1961
- 3:08 Genetic code read in triplets The Institute's interpretation · Crick, “The genetic code”, J. Mol. Biol. 1961
- 3:17 Our Genetic Blueprint
- 3:24 How many chromosomes do we carry?
- 3:48 Human genome ≈3.1 billion base pairs Historical record · International Human Genome Sequencing Consortium, “Initial sequencing and analysis of the human genome”, Nature 2001
- 4:12 Maternal lineage holds the soul Tradition / scripture · Various cultural myths linking lineage to the mother
Sources
Historical record: Rosalind Franklin, Photo 51 (1952), King’s College London · Watson & Crick, “Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid”, Nature 1953 · Erwin Chargaff, “The composition of nucleic acids”, J. Biol. Chem. 1949 · Meselson & Stahl, “The replication of DNA in Escherichia coli”, PNAS 1958 · Francis Crick, “On protein synthesis”, Symp. Soc. Exp. Biol. 1961 · Nirenberg & Matthaei, “RNA Code”, Proc. Natl. Acad. Sci. 1961 · Tjio & Levan, “The chromosome number of man”, Nature 1956 · International Human Genome Sequencing Consortium, “Initial sequencing and analysis of the human genome”, Nature 2001 · Anderson et al., “Sequence and organization of the human mitochondrial genome”, Nature 1981
Tradition / scripture: Various cultural myths linking lineage to the mother
The Institute's interpretation: Watson & Crick, 1953 · Crick, “The genetic code”, J. Mol. Biol. 1961 · Lander et al., “Initial sequencing and analysis of the human genome”, Nature 2001
Sound: synthesized ambient (wind, drone, water) (CC0 — made by SoapBox). Made in 57 s of CPU.
Scenes Hathor has no parts for yet (12) — the next things to make
- 1950s laboratory, Rosalind Franklin examining a diffraction plate under a microscope.
- Cambridge University lab, two scientists drawing the double helix on a blackboard.
- Copying the Code: Understand semi‑conservative replication and why the helix protects genetic information.
- 1960s conference hall, Crick presenting a chalk diagram of tRNA.
- 1960s conference hall, Crick presenting a chalk diagram of tRNA.
- Laboratory bench, poly‑U RNA added to a cell‑free extract.
- Laboratory bench, poly‑U RNA added to a cell‑free extract.
- 1960s textbook illustration of a ribosome translating mRNA.
- 1950s cytogenetics lab, microscope slide showing stained chromosomes.
- A sprawling chromosome map on a screen highlights roughly twenty thousand gene icons, each glowing to show protein‑coding potential.
- A replication fork animates, polymerase enzymes glide along strands, adding complementary bases as the helix splits and reforms.
- A single gene region is magnified, transcription machinery assembles, and a strand of mRNA exits the nucleus like a ribbon.