Results 231 to 240 of about 54,152 (260)
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Journal of Experimental Zoology, 1965
AbstractOogenesis in rabbits was investigated by examining the development of germ cells after birth. The transformation of oogonia to oocytes begins in the one day old animal. The appearance of the different stages of meiotic prophase was noted and their differential distribution in the germ cell population determined.
H, PETERS, E, LEVY, M, CRONE
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AbstractOogenesis in rabbits was investigated by examining the development of germ cells after birth. The transformation of oogonia to oocytes begins in the one day old animal. The appearance of the different stages of meiotic prophase was noted and their differential distribution in the germ cell population determined.
H, PETERS, E, LEVY, M, CRONE
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Archives of Gynecology and Obstetrics
Epigenetic changes include all modifications affecting the expression of genes without changing the nucleotide sequence of the genome. Most studied epigenetic changes include DNA methylation, histone alterations and non-coding RNAs. DNA methylation is an important epigenetic mark, protecting the genome during gametogenesis and early embryo development.
Neda Sindik +2 more
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Epigenetic changes include all modifications affecting the expression of genes without changing the nucleotide sequence of the genome. Most studied epigenetic changes include DNA methylation, histone alterations and non-coding RNAs. DNA methylation is an important epigenetic mark, protecting the genome during gametogenesis and early embryo development.
Neda Sindik +2 more
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Zygote, 2017
SummaryRecently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals.
Tania Janeth, Porras-Gómez +1 more
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SummaryRecently, the existence of a mechanism for neo-oogenesis in the ovaries of adult mammals has generated much controversy within reproductive biology. This mechanism, which proposes that the ovary has cells capable of renewing the follicular reserve, has been described for various species of mammals.
Tania Janeth, Porras-Gómez +1 more
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Intercellular bridges in lizard oogenesis
Cell Differentiation, 1976Study of the germinal epithelium in the adult lizard shows that the germ cells constitute clusters of synchronized cells interconnected by intercellular bridges. Such bridges interconnect oogonia as well as early meiotic prophase oocytes (zygo-pachitene).
FILOSA, SILVANA, TADDEI C.
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Development, 1967
ABSTRACT It has been claimed that new germ cells are formed after maturity in certain female prosimians. A histological study was made of the ovaries of adults of four of these species (Galago crassicaudatus, G. demidoffi, Perodicticus potto and Loris tardigradus lydekkerianus), and of juvenile specimens of Loris.
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ABSTRACT It has been claimed that new germ cells are formed after maturity in certain female prosimians. A histological study was made of the ovaries of adults of four of these species (Galago crassicaudatus, G. demidoffi, Perodicticus potto and Loris tardigradus lydekkerianus), and of juvenile specimens of Loris.
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Cytoplasmic Inclusions in Oogenesis
1965Publisher Summary This chapter focuses on the cytoplasmic inclusions in oogenesis, and discusses the structure and functions of the Golgi apparatus and mitochondria in eggs and their role in vitellogenesis. Investigation of Golgi apparatus in eggs is beset with special difficulty because of the presence of yolk, which becomes enormous in quantity as ...
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