Once chromosomes were recognized as the carriers of genes scientists sought to understand the structure of deoxyribonucleic acid or DNA the chemical that makes up chromosomes.
In 1953 the American geneticist James Watson and British biophysicit Francis Crick published their discovery that DNA molecules have a ladder like double helix structure.Also important was the work of the British X Ray crystallographer Rosalind Franklin who used a special technique X- Ray diffraction to produce hiqh quality images of DNA.
The combined efforts of Franklin,Watson and Crick opened up a whole new vista by helping explain how chromosomes are replicated.
Analysis of the DNA from a wide variety of organisms provided new perspectives on biological relationships and also shed light on the growing list of illnesses such as viral and bacterial infections ,cancer,heart disease and stroke
In 1953 the American geneticist James Watson and British biophysicit Francis Crick published their discovery that DNA molecules have a ladder like double helix structure.Also important was the work of the British X Ray crystallographer Rosalind Franklin who used a special technique X- Ray diffraction to produce hiqh quality images of DNA.
The combined efforts of Franklin,Watson and Crick opened up a whole new vista by helping explain how chromosomes are replicated.
Analysis of the DNA from a wide variety of organisms provided new perspectives on biological relationships and also shed light on the growing list of illnesses such as viral and bacterial infections ,cancer,heart disease and stroke
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