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Module 5.2 · Topic 7

Knock-Out and Knock-In Animals

⏱ 13 min★ Up to 115 XP📝 4 questions

Module 5.2 · Topic 7

RNA interference could silence a gene temporarily. This does it permanently.

RNA interference, several modules back, let researchers silence a specific gene in cell culture, temporarily, at the RNA level. This lesson's technique does something related but genuinely more permanent — disabling a gene at the DNA level itself, in an entire living animal, from birth.

RNAi silences a gene's mRNA transcript, but leaves the underlying DNA sequence completely untouched — the effect fades once the siRNA is degraded. A knock-out animal has the actual gene disrupted at the genomic level. Which effect is permanent?

Practice Questions

ConceptQuestion 1 of 4

A knock-out animal is created by:

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