Anatomy Fertilization and Development of Embryo 7e7d4ab7

Primitive streak is initiated and maintained by

Nodal gene

BMP4

FGF

Brachyury gene

High-Yield Explanation

Ans. is 'a' i.e. Nodal gene "The primitive streak in itself is initiated and maintained by expression of Nodal, a member of the transforming growth factor b (TGFb) family." - Longman's Medical embryology 10/e, p 57

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Primitive streak is initiated and maintained by

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