Necessity and Contingency in Developmental Genetic Screens: EGF, Wnt, and Semaphorin Pathways in Vulval Induction of the Nematode Oscheius tipulae

发育遗传筛选中的必要性和偶然性：线虫 Oscheius tipulae 外阴诱导中的 EGF、Wnt 和 Semaphorin 通路