MCQ
A child's blood group is ‘$O$'. The parents blood groups cannot be
- ✓$AB$ and $O$
- B$B$ and $O$
- C$A$ and $B$
- D$A$ and $A$
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$R$ : Pathogens often develop resistance to existing antibiotics.
$I.$ Identification of $DNA$ with desirable genes
$II.$ Gene transfer
$III.$ Maintenance of $DNA$ in host and gene cloning
$IV.$ Introduction of $DNA$ into host to from recombinant $DNA$
Which of the following represents the correct sequence of steps?