What is DNA?

DNA is the building block of a gene and each gene codes for a specific protein. A person has 20,000 to 25-000 genes that account for nearly 3 percent of our DNA. Scientists are not clear about the functionality of the remaining 97 percent that may take part in controlling the genes.

In a basic language, it can be said thatĀ DNA is in geneĀ and the genes are on chromosomes. It is also known as deoxyribonucleic acid. Almost all the cells in the body of a person contain similar DNA. Most of these exist in the cell nucleus and others can be found in mitochondria. The data in DNA is maintained as a code created by four chemical bases such as thymine, guanine, adenine, and cytosine. Human DNA comprises of around 3 billion bases, where more than 99 percent of those bases are similar in all individuals. The succession of these bases decides the data accessible for building and keeping up an organism.

A gene is the essential physical and utilitarian unit of heredity. They are comprised of DNA behaves as guidelines to make molecules known as proteins. In people, genes distinguish in sizes from a hundred DNA bases to more than a couple of 2 million bases.

Each individual possesses two copies of each gene, one received from each parent. Most numbers of genes are exactly similar in all individuals, yet very few genes are marginally different between individuals. Alleles are types of a similar gene with little contrasts in their arrangement of DNA bases. These little contrasts add to every individual’s special physical characteristics.

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