List the salient features of Human Genome.

Explanation

a. The human genome contains 3164.7 million nucleotide bases.
b. The average gene consists of 3000 bases, the largest known human gene being dystrophin at 2.4 million bases.
c. The total number of genes is estimated to be 30000 and `99.9%` nucleotide bases are exactly the same in all people.
d. The functions are unknown for over `50%` of the discovered genes.
e. Less than `2%` of the genome codes for proteins.
f. The human genome contains large repeated sequences.
g. The repeated sequence is thought to have no direct coding functions but they throw light on chromosome structures, dynamics and evolution.
h. Chromosome 1 has most genes(2968) and the Y has the fewest genes(231).
i. Scientists have identified about 1.4 million locations called SNPS or single nucleotide polymorphism occur in humans.