基因打靶( Gene targeting) ·基因剔除(常规、条件性) Gene Knock-out, conventional and conditional) 基因敲入( Gene Knock-in) 基因捕荻( Gene Trap)基因打靶 (Gene targeting) • 基因剔除（常规、条件性） (Gene Knock-out, conventional and conditional) • 基因敲入(Gene Knock-in) • 基因捕获(Gene Trap)