MCQ
Choose incorrect pair :
- AInner cell mass - Inner group of cells
- B$16$ cells embryo - Morula
- CTrophoblast - Chorionic layer
- ✓Placenta - Secreat Oxytocin
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$I.$ 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?