What is DNA ?
Every cell n every living thing or organism has DNA , A molecule that contains all the information about the organism . Lengths of connected DNA molecules, called genes, are like smallest pieces of a secret code. They determine what each organism is like in great detail.
Genes are passed on from parents to children m and no two organism except identical twins have the same DNA. Many things about us - the color of our
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DNA 'Fingerprints "
DNA is located in each of your cells , including your blood, saliva, hair follicles, and skin. No one else has a DNA paternity exactly like yours .Using skin or hair collected at a crime scene and samples from a suspect, scientist can analyze the makeup of the same person. Cells from persons at a crime scene can be evidence that the person was present at the crime DNA evidence is also used to show that some convicted people are innocent.
What makes us Human
The human genome is the DNA code for our species its's what makes us human beings .In 2000 the U.S. Human Genome Project reached a milestone .I identified the 3.1 Billion separate codes in human DNA. in 2001 , researchers reported that the human genome contains about 30,000 to 40,000 genes . For the first time ,We got an outline of the genetic code for the human race.
Surprising , Humans don't have that many more genes than the roundworm , which has about 20,000 ! But we do have three times as many kinds of proteins called Alternative splicing. This means that the same genes can produce more than one kind of protein . By studying genes scientists can learn more about hereditary diseases and get a better idea of how human beings involved.
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