Genome is the total hereditory information of an organism . It includes gene and non-coding sequences of DNA .
The human genome has approximately 3.3billion base pairs and there are approximately 23000 genes in human being .
The average gene consists of 3000 bases .
Human genome has significantly more repeated sequences than other mammalian genome They are thought to provide idea on chromosome structure , dynamics and evolution .
The function are unknown over 50 percent of discovered genes .
Less than 2 percent genome codes for protein .
The chromosome 1 has most genes and y-chromosome has the fewest genes .
It is known that there are about 1.4million location where single base differences occure in humans . This called single nucleotide polymorphism .
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