Question

Write short note on primitive streak

Answer 1

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the primitive streak is a structure that forms in the blastula during the early stages of avian , reptilian , and mammalian embryonic development . it forms on the dorsal (back)
face of the developing embryo , towards the caudal or posterior end . the presence of primitive streak will establish bilateral symettery , determine the site of gastrulation and initiate germ layer formation .

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