Cell Divisions, Duration of Interkinetic States and Differentiation in Early Stages of Embryonic Development

1964 ◽  
pp. 323-362 ◽  
Author(s):  
T.A. DETTLAFF
Keyword(s):  
Embryonic Development ◽  
Cell Divisions ◽  
Early Stages

Reproduction

2017 ◽  
Author(s):  
Derek Burton ◽  
Margaret Burton
Keyword(s):  
Reproductive Behaviour ◽  
Life Cycles ◽  
Freshwater Species ◽  
Adult Fish ◽  
Reproductive Patterns ◽  
Cell Divisions ◽  
Early Stages ◽  
External Cues ◽  
Neural Factors

Interspecific fish reproductive patterns, outputs and life cycles display the greatest variability within the vertebrates. Early stages of oogenesis can be repeated in adult fish, contrasting with mammals; the pre-set sequence of cell divisions in gametogenesis is otherwise similar and is described in detail. Most fish deposit much yolk (vitellogenesis) in developing eggs. Migrations, beach-spawning and mouth-brooding are some of the interesting variations. Fertilization is predominantly external but is internal in some groups such as chondrichthyans. The omission of annual reproduction is well established in some freshwater species and the idea that this may also be the case for marine teleosts is gaining acceptance. This should be taken into account for intensively fished species. The possible roles of external cues, hormones, pheromones and neural factors acting as ‘switches’ and coordinators in gametogenesis and reproductive behaviour are discussed.

scholarly journals Features of DNA Repair in the Early Stages of Mammalian Embryonic Development

Genes ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1138 ◽  
Author(s):  
Evgenia V. Khokhlova ◽  
Zoia S. Fesenko ◽  
Julia V. Sopova ◽  
Elena I. Leonova
Keyword(s):  
Dna Damage ◽  
Dna Repair ◽  
Embryonic Development ◽  
Somatic Cells ◽  
Genomic Integrity ◽  
Embryonic Period ◽  
Early Stages ◽  
Mammalian Embryos ◽  
Disparate Data ◽  
Mammalian Embryonic Development

Cell repair machinery is responsible for protecting the genome from endogenous and exogenous effects that induce DNA damage. Mutations that occur in somatic cells lead to dysfunction in certain tissues or organs, while a violation of genomic integrity during the embryonic period often leads to death. A mammalian embryo’s ability to respond to damaged DNA and repair it, as well as its sensitivity to specific lesions, is still not well understood. In this review, we combine disparate data on repair processes in the early stages of preimplantation development in mammalian embryos.

scholarly journals A proof of concept study demonstrating that environmental levels of carbamazepine impair early stages of chick embryonic development

2019 ◽  
Vol 129 ◽  
pp. 583-594 ◽  
Author(s):  
Ayelet Kohl ◽  
Naama Golan ◽  
Yuval Cinnamon ◽  
Olga Genin ◽  
Benny Chefetz ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Proof Of Concept ◽  
Concept Study ◽  
Early Stages

The dynamics of structural modifications of mitochondria at the early stages of sea urchin embryonic development

1992 ◽  
Vol 16 (2) ◽  
pp. 155-163 ◽  
Author(s):  
V POLYAKOV ◽  
D FAIS ◽  
I KIREYEV ◽  
O OLIVA ◽  
A RINALDI ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Sea Urchin ◽  
Structural Modifications ◽  
Early Stages

scholarly journals Expression analysis of the chicken homologue of CITED2 during early stages of embryonic development

2000 ◽  
Vol 98 (1-2) ◽  
pp. 157-160 ◽  
Author(s):  
Thomas Schlange ◽  
Birgit Andrée ◽  
Hans-Henning Arnold ◽  
Thomas Brand
Keyword(s):  
Embryonic Development ◽  
Expression Analysis ◽  
Early Stages

l-DOPA supply to the neuro retina activates dopaminergic communication at the early stages of embryonic development

2004 ◽  
Vol 86 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Regina C. C. Kubrusly ◽  
Marília Zaluar P. Guimarães ◽  
Ana Paula B. Vieira ◽  
Jan N. Hokoç ◽  
Dulce E. Casarini ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Early Stages
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