The history of the germ cells in the viviparous teleost platypoecilus maculatus

Journal of Morphology - Tập 52 Số 1 - Trang 115-153 - 1931
Louis Wolf1
1Zoological Laboratory, Cornell University, Ithaca, New York.

Tóm tắt

AbstractThis study is based upon a series of ontogenetic stages from just before coelom formation to maturity.Primordial germ ceils are first seen at the outer edge of the lateral mesoderm and are traced from there to a position in the genital analagen. Counts indicate that most of them succeed in reaching the genital anlagen, where they from definitive reproductive cells in both sexes.The evidence seems to show that there is some transformation of somatic cells into germ cells in the immature female, but that this transformation is not extensive. In the male the primordial germ cells are the sole source of the definitive elements.

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Tài liệu tham khảo

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Thông tin
Thông tin xuất bản

Journal of Morphology

Tập 52 Số 1

115-153

Thông tin tác giả