Cloning Organisms and Genes: Interactive Biology Widget

Most "cloning" has nothing to do with sheep

When you hear "clone," Dolly the sheep probably comes to mind — but gene cloning (copying DNA in plasmids or by PCR) is a daily research tool, while whole-organism cloning remains rare and ethically fraught. Drag the slider to see how success rates change across cloning methods.

Cloning Methods Gene Cloning (Plasmid)

Drag to compare success rates and complexity

SUCCESS RATE: ~100%
Gene (plasmid) Gene (PCR) SCNT (Dolly)
Success rate ~100%
Copies per run 10⁶+
Therapeutic cloning uses somatic cell nuclear transfer (SCNT) to create embryonic stem cells for research and potential treatments — the embryo is never implanted, so no organism develops. Reproductive cloning (like Dolly) uses the same SCNT technique but implants the embryo to produce a live animal. The biology is identical; the ethical dividing line is whether you let development continue. Dolly proved mammals could be cloned from adult cells, but success rates remain below 5% — most embryos fail, and survivors often have health defects. Meanwhile, natural clones (identical twins, asexual organisms like strawberry runners) happen all the time with zero intervention and 100% viability.
Know This

Gene cloning (plasmids, PCR) is routine lab work with near-perfect success, while whole-organism cloning via SCNT remains technically difficult and raises welfare concerns that natural clones never encounter.