1.

Give any six features of the human genome.

Answer» Slient features of humen genome
(i) The humen genome contains 3164. 7 million nucleotide bases.
(ii) The average gene consists of 30000 the largest know humen gane being dystrophin at 2.4 Million bases .
(iii) The total number of genes is estimated to be 30000 and 99.9% nuceotide bases are exactly the same in all people.
(iv) The functions are unknown for over 50% of the discovered genes.
(v) Less than 2% of the genome codes for proteins.
(vi) The humen genome contains large repeted sequences .
(vii) The repeated sequence is through to have no direct coding functions but they throw light on chromosomes struction , dynamics and evolution .
(viii) Chromosome I has most genes (2968) and the Y has the fewest genes(231)
(ix) Scientists have identified about 1.4 million location where single base DNA sequence differences called SNPs or Single Nucleotide Polymorphisms occur in humans.


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