In shotgun sequencing, DNA fragments are sequenced before their
correct order is known.
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because answer.com suck
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Shotgun sequencing refers to a laboratory method for determining
the DNA sequence of an organism's genome. This technique breaks the
genome into small DNA fragments that are sequenced separately.
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THERE ARE TWO TYPES OF DNA SEQUENCING......
1) MAXAM-GILBERT METHOD (OR) CHEMICAL METHOD...
2) SANGER DI-DEOXY METHOD...
3) Shotgun sequencing
4) Primer walking
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Because instead of matching shapes your matching dna base
sequences