1. DNA Probes
(Category/DNA Testing)

In 1961, researchers Sol Spiegelman and Edward Hall discovered that single-stranded DNA forms hydrogen bonds with a complementary strand of RNA and yields a double-stranded DNA-RNA molecule. For the next ...

2. Polymerase Chain Reaction - PCR
(Category/DNA Testing)

... a month to accomplish the same feat.) The DNA probe can then be used with a greater degree of accuracy and yield a more reliable result. To multiply a DNA molecule with the PCR, four ...

3. DNA Analysis and Diagnosis
(Category/DNA Testing)

... to these techniques is the DNA molecule. It is now possible to reproduce DNA in a test tube, fragment it, determine its composition, change its structure, and map its genes. The principles learned from ...

4. Forensic DNA Typing
(Category/DNA Testing)

... DNA typing, DNA profiling, or DNA patterning. The acronym DNA is short for deoxyribonucleic acid, the name given to a group of molecules that occur in all cells of all living organisms and that carry ...

5. Passing Genes to the Next Generation
(Category/Genetics)

Following the discovery of the structure of DNA, scientists knew that the DNA molecule carried hereditary information from one generation to the next and what the molecule looked like. But exactly how ...

6. Chromosome Theory of Heredity
(Category/Genetics)

... from many other types of cells. He discovered that nuclein was slightly different from the organic molecules that scientists had found so far. Up until this moment, organic molecules were known to contain ...

7. Early Ideas about Heredity
(Category/Genetics)

... Needham (1713–1781) claimed that all inorganic molecules, such as air and the oxygen in it, contained a “life force” that allowed spontaneous generation to occur. Needham proved his claim by boiling some ...

8. Fossil Avian Eggshell Preserves Ancient DNA
(Category/DNA News)

Owing to exceptional biomolecule preservation, fossil avian eggshell has been used extensively in geochronology and palaeodietary studies. Here, we show, to our knowledge, for the first time that fossil ...

9. Genes and Chromosomes
(Category/DNA Structure)

Cells are the basic building blocks of all living things. There are trillions of cells in the human body, almost all of which contain a chemical molecule that carries hereditary material. This chemical ...

10. Rosalind Franklin
(Category/DNA Structure)

... solids—led to her discovery that the sugar-phosphate backbone of DNA lies on the outside of the DNA molecule. Her studies also revealed the helical, or spiral, structure of the molecule. Franklin’s discoveries, ...

11. Watson and Crick
(Category/DNA Structure)

... mentioning Crick, because the discovery they made about the molecule of life was truly a joint enterprise. Years after the discovery, Crick recalled introducing Watson to someone at the laboratory where ...

12. DNA Encyclopedia
(Uncategorised Content)

DNA is probably one of the most complex molecules in living organisms. It stores genetic information needed for development and functioning of the organism. It is like a book of blueprints to make all ...

13. About DNA Encyclopedia
(Uncategorised Content)

... the blood basis of heredity was challenged and eventually discarded. In its place, scientists developed an interest in nucleic acid molecules organized into functional units called genes. Scientists guessed ...

14. DNA Structure
(Category)

... molecules that scientists had found so far. Up until this moment, organic molecules were known to contain the elements carbon, hydrogen, oxygen, and nitrogen. But nuclein also contained the element phosphorous. ...