Answer:
Friedrich Mieschers was a Swiss physician who discovered the DNA from white blood cells.
<em>Hence, the contribution of Friedrich Mieschers for the genetic code is that he isolated and observed the DNA. DNA is the material from which the genetic code is made. </em>
Friedrich discovered that the white blood cells have a substance called nuclein which is present in the nucleus of an atom. He discovered that this substance was acidic in nature and contained phosphates hence, it could not be a protein.
The idea needs to be tested for it to be scientifically reliable. First, a hypothesis has to be drawn up. A simple explanation for the word "hypothesis" is an educated guess. The scientist makes an educated guess in answer to a problem. He then sets about proving or disproving the hypothesis. This is done by setting up related scientific experiments. <span>For the theory to be scientifically proved, the experiments need to be set up in such a way that the results are measurable. </span>