D.N.A

Hey guy I'm back with another blog post and today we will be talking about D.N.A. Without these we wouldn't be here. lets begin.


DNA is basicly a blue print to everything it the world.  DNA is deoxyribonucleic acid. It is the genetic material of all organisms. It is made up of two twisted strands of sugar-phosphate molecules and nitrogen bases. It help us grow and function.

Rosalind Franklin discovered that DNA is two chains of molecules in spiral form. James Watson and Francis Crick made a model of a DNA molecule.

DNA looks like a twisted later. The sides of the ladder are made up of sugar-phosphate molecules. The four kinds of nitrogen bases are adenine, guanine, cytosine and
thymine. The amount of cytosine is equal to the amount of guanine and the amount of adenine is equal to the amount of thymine. So, Cytosine is always paired with guanine and adenine is always paired with thymine.

Before mitosis the chromosomes are duplicated and the amount of DNA
in the nucleus is doubled. The two sides of DNA unwind
and separate. Each side then becomes a pattern on
which a new side forms. The new DNA has bases that are
identical to those of the original DNA and are in the same
order.

A sample of a suspect’s DNA can be compared to evidence from the crime scene to help determine if the suspect is guilty. If there isn’t a suspect, evidence from
the crime scene can be compared to a general database of criminals the police may maintain. Crime scene evidence can also be compared to other crime scene DNA information the police may have on file to link two crimes
together.





liks
http://www.justice.gov/ag/dnapolicybook_solve_crimes.htm
http://gifsoup.com/view/1626723/ben-10-to-humoungasaur.html