Some of the salient Observations drawn from human genome project are as follows:

$(i)$ The human genome contains $3164.7$ million nucleotide bases.

$(ii)$ The average gene consists of$3000 $bases, but sizes vary greatly, with the largest known human gene being dystrophin at $2.4$ million bases.

$(iii)$ The total number of genes is estimated at $30,000$ -much lower than previous estimates of 80,000 to $1,40,000$ genes. Almost all ($99.9$ per cent) nucleotide bases are exactly the same in all people.

$(iv)$ The functions are unknown for over $50$ per cent of the discovered genes.

$(v)$ Less than $2$ per cent of the genome codes for proteins.

$(vi)$ Repeated sequences make up a very large portion of the human genome.