Gene flow — the movement of genetic material between populations — is a powerful evolutionary force that shapes biodiversity, adaptation, and even our own human history. From pollen drifting on the ...

The natural RNAi mechanism can be directed by either short interfering RNA (siRNA) or microRNA (miRNA). 1 There are four key steps in the RNAi pathway. When miRNA acts as the guide for RNAi, only a ...