Biology / Unit 7 Bio 1543 short lesson, about 20 seconds
"A Clone Is a Perfect Identical Copy"
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The idea
A reproductive clone is not a perfect identical copy of its donor, because mitochondrial DNA, environment, and epigenetic marks all still differ.
In practice
A cloned animal's mitochondrial DNA comes from the recipient egg, not the donor, so its full genome never fully matches the donor's.
Where people slip
Matching nuclear DNA is not matching every heritable influence — mitochondria, environment, and epigenetics differ too.
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