Genetics - the basis of structure, of life, and of mankind

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Ellen Adams

Genetics

Every single form of life on the planet is created and controlled by a chemical 'recipe', a chemical code consisting of hundreds of thousands of instructions in every single cell, the basis of structure, of life, and of mankind. Who, what, where, when, how, and why, are all questions which for centuries have remained unanswered. They demanded an extraordinary amount of skill, time, and precision from individuals the world over to be conquered to our current level of understanding.

Many discoveries have led to the discovery of genetics. In 1895, Wilhelm Roentgen, a german physicist, accidentally discovered x-rays, whilst studying cathode rays in a high voltage gaseous discharge tube. This marked the beginning of a long series of explorations and experiments, eventually leading to the discovery of DNA.

A year later in 1896, Antoine Becquerel, this time a french physicist, discovered through experimentation and observation, the disintegration of electromagnetic rays (x-rays, and gamma rays), also known as radioactivity. He was observing the element uranium and saw that it could blacken a photographic plate even though the latter was separated by a sheet of glass and paper. Becquerel also noticed that the rays were capable of emitting charge captured by an electroscope, which showed they possessed an electric charge too.

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Becquerel's idea was revolutionised in 1898 by Pierre and Marie Curie who suggested radioactivity occurred due to the structure of atoms. Max Von Laue then discovered x-ray diffraction in 1912, which was, not long after, mathematically interpreted by Lawrence Bragg by analysing the different diffraction patterns made by x-rays  when they deviate from their original paths, due to closely spaced atoms in the crystal.  Bragg didn’t believe that Laue's theory was correct in detail. He therefore carried out numerous experiments and concluded by using the now common 'Bragg law'. This details at what angles x-rays will be most efficiently ...

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