Human DNA
ØOne copy of Homo sapiens DNA contains three billion base pairs located on 23 chromosomes. It codes for approximately 50,000 genes.
ØSo, only a few percent of our DNA actually codes for protein!
1.DNA that codes for protein. Exons 2-3{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190}
2.Non-coding single copy. Intron DNA 70{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190}
3.Non-coding repetitive DNA. 30{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190}. Of this:-
Randomly repetitive An interesting example of randomly repetitive DNA is the ALU Family. This is a 300bp sequence that is randomly repeated 500,000 times in our DNA! (5{7bda82c1e6998b9ed8f6e0f52f1ca5ed9d6da876adcfbd0d890c6e0d88340190} of total!)
Tandemly repetitive An example of tandemly repetitive DNA is the sequence (GGGCAGC)n. This sequence is tandemly repeated in different locations in our DNA.
Download Tag | DNA PROFILING, PRIYANAKA TYAGI |
Download Category | NCERT |
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