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Study the following statements and choose the incorrect.
a) Largest known human gene coding for dystrophin has 2.4 billion bases.
b) Polymorphism in DNA sequence is the basis of genetic mapping of human genome as well as of DNA
fingerprinting.
c) DNA polymorphism in non – coding DNA sequence may have immediate impact in an individual’s reproductive ability.
d) Chromosome 1 has most genes and Y has the fewest genes.
e) HGP observed the total number of genes to be 80,000, much higher than previous estimate of 30,000 genes.
Choose the most appropriate answer from the options given below.

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(a), (c)and (e) only

(b) and (d) only

(c), (d) and (e) only

answer is B.

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Detailed Solution

Largest known human gene coding for dystrophin has 2.4 million bases.

Polymorphism in DNA sequence is the basis of genetic mapping of human genome as well as of DNA fingerprinting.

DNA polymorphism in non – coding DNA sequence does not have immediate impact in an individual’s reproductive ability.

Chromosome 1 has most genes and Y has the fewest genes.

The total number of genes is estimated at 30,000 by HGP which is much lower than previous estimates of 80,000 to 1,40,000 genes.

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