MCQ
Which was the last human chromosome to be completely sequenced:
- ✓Chromosome $1$
- BChromosome $11$
- CChromosome $21$
- DChromosome $x$
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$A\;\;;\;\;B\;\;;\;\;C$
Reason : Presence of insert results in inactivation of enzyme $\beta -$ galactosidase known as insertional inactivation.