果蝇的mago-nashi（无孙）基因突变产生的后代在种质组合和种系发育方面存在缺陷这个基因编码哺乳动物的mago-nashi同源基因在哺乳动物中，mRNA的表达并不局限于原生质，而是在成体组织中广泛表达，可通过血清刺激静止成纤维细胞诱导表达[由RefSeq提供，2008年7月]
Drosophila that have mutations in their mago nashi (grandchildless) gene produce progeny with defects in germplasm assembly and germline development. This gene encodes the mammalian mago nashi homolog. In mammals, mRNA expression is not limited to the germ plasm, but is expressed ubiquitously in adult tissues and can be induced by serum stimulation of quiescent fibroblasts. [provided by RefSeq, Jul 2008]