• At the gastrula phase of development, just after the onset of implantation, the embryo proper is characterized by extremely rapid cell proliferation. (sckcen.be)
  • The areas of the embryo are clearly defined to the naked eye and the embryos are at late tailbud stage. (axolotl.org)
  • I ) In situ hybridization of endogenous Isl1 , compared to ( J ) stage-matched mouse enhancer-electroporated embryo. (elifesciences.org)
  • A-H ) Time lapse analysis of a live chick embryo expressing GFP under the control of Nkx2-5- en analyzed at different time points. (elifesciences.org)
  • Zebrafish embryo expressing Histone H2A-GFP imaged every 6 min from late gastrula to 15-17 somite stage. (bruker.com)
  • Staining with mAb 2F4 ( B ) clearly shows a membrane staining while DAPI stains the nuclei ( C ). ( D ) Wholemount immunostaining of tailbud stage embryo fixed in DENTS (20% DMSO 80% Methanol) using mAb 2F4. (elifesciences.org)
  • The embryo is the earliest stage of development and remains within the egg or reproductive organs of the mother until hatching or birth. (microbiologynote.com)
  • The study of embryo development is known as embryology, which is a branch of biology dedicated to understanding the processes and stages of embryonic growth. (microbiologynote.com)
  • These studies provide genetic evidence for an essential function of a homeodomain protein in ß-catenin-mediated induction of the dorsal gastrula organizer and place boz at the top of a hierarchy of zygotic genes specifying the dorsal midline of a vertebrate embryo. (zfin.org)
  • A partial lifecycle study exposing S. tropicalis to varying concentrations of DE-71 (0.0, 0.65, 1.3, 2.5, and 5.0 g/L [nominal]) was conducted from early gastrula stage embryo to 150 d post-metamorphosis (dpm). (datadryad.org)
  • In some lower animals the amount of yolk is less in egg, so that the embryo hatches in earlier stages of development, called a larva. (biologydiscussion.com)
  • Camera lucida sketches of the zebrafish embryo at selected stages. (ucsd.edu)
  • C) Zygote-morula-blastula-gastrula-embryo. (ventolaphotography.com)
  • What is the first stage of an embryo? (ventolaphotography.com)
  • Hence the correct answer is 'C' i.e, Zygote-morula-blastula-gastrula-embryo. (ventolaphotography.com)
  • embryo, the early developmental stage of an animal while it is in the egg or within the uterus of the mother. (ventolaphotography.com)
  • The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus. (ventolaphotography.com)
  • Great apparent differences may also be brought about by variations in the period at which the embryo is set free as a larva, and since two free-swimming stages, planula and actinula, are unnecessary, one or other of them is always suppressed. (yourdictionary.com)
  • In Cordylophora the embryo is set free at the parenchymula stage as a planula which fixes itself and develops into a polyp, both gastrula and actinula stages being suppressed. (yourdictionary.com)
  • Moreover, their embryo goes through the gastrula stage during embryonic development. (pediaa.com)
  • The characteristic features of metazoans are the consumption of organic material, breathing oxygen, ability to move, sexual reproduction, and growth from a hollow sphere of cells known as blastula during embryonic development while the characteristic features of eumetazoans are the presence of true tissues, neurons, and an embryo that goes through a gastrula stage. (pediaa.com)
  • We screened gastrula embryos for DNA synthesis, nuclear morphology, growth, and chromosome aberrations (CA) shortly after irradiation with doses up to 2.5 Gy. (sckcen.be)
  • Sox17 ChIP-seq of gastrula embryos. (xenbase.org)
  • They should be near or past the blastula stage at this point (note the gas bubbles stuck to the egg jelly) - it's hard to be certain of their developmental stage because the embryos lack pigment. (axolotl.org)
  • This indicates that the embryos are at late gastrula stage. (axolotl.org)
  • B-F) Tailbud tadpole stage embryos injected bilaterally at the two-cell stage with 50 ng control (CT) or pqbp1 (PQ) MOs as indicated (embryos in F received 100 ng MOs in total). (xenbase.org)
  • H) Phenotypes of tailbud stage embryos dorsally targeted with control (CT) or the indicated amount of pqbp1 MO1. (xenbase.org)
  • right panel, embryos injected dorsally with pqbp1 mRNA (2 ng) at the four-cell stage. (xenbase.org)
  • F-J ) Cross sections through different stages of embryonic development corresponding to the embryos shown in A-D. The mouse Isl1- en (green, GFP) and control pCAAG-RFP (red). (elifesciences.org)
  • In vertebrate gastrula embryos, the ectoderm is subdivided into various regional tissues by complex inductive processes. (biologists.com)
  • Embryos were injected at the one-cell stage with a morpholino targeting adam13 (10 ng MO13). (elifesciences.org)
  • A ) Western blot from total membrane extracted from 10 embryos at gastrula stage (Stage 10) and early tailbud stage (Stage 20) detected using mAb2F4. (elifesciences.org)
  • Western blot with mAb 2F4 from glyctoproteins isolated from 20 embryos at stage 20. (elifesciences.org)
  • Using in vivo incorporation of the DNA replication marker BrdU (5-bromo-2'-deoxyuridine) and anti-phospho-histone H3 immunolabelling, we found that a localised posterior region of proliferating cells does not occur at any developmental stage in onychophoran embryos. (biomedcentral.com)
  • This study evaluated the final output and quality of in vitro produced blastocysts derived from in vivo recovered sheep embryos cultured at various early developmental stages to blastocyst. (cambridge.org)
  • Inside the eggs, the embryos are in the gastrula stage. (triopsgalaxy.de)
  • Gastrulation movements are orchestrated by a small, heterogeneous group of cells with inductive and morphogenetic properties located in the dorsal lip of the blastopore (DBL) of the amphibian gastrula known as the Spemann-Mangold organizer or dorsal organizer. (nature.com)
  • Gastrula fate map (dorsal right) colored by different tissues. (xenbase.org)
  • D) Expression of pqbp1 , wbp11 , chordin and sox2 in late gastrulae, dorsal- posterior views. (xenbase.org)
  • Messenger RNA for RFP alone or combined with the different constructs was injected at the 8-cell-stage in a dorsal animal blastomere. (elifesciences.org)
  • The dorsal gastrula organizer plays a fundamental role in establishment of the vertebrate axis. (zfin.org)
  • Interestingly, before the establishment of the preplacodal region, Xfoxi1a expression is detected in the entire cephalic non-neural ectoderm at the mid- and late gastrula stages. (biologists.com)
  • The ectoderm loses entirely the ciliation which it had in the planula and actinula stages and commonly secretes on its external surface a protective or supporting investment, the perisarc. (yourdictionary.com)
  • The general ectoderm covering the surface of the body has entirely lost the cilia present in the earlier larval stages ( planula ), and may be naked, or clothed in a cuticle or exoskeleton, the perisarc (ps), which in its simplest condition is a chitinous membrane secreted by the ectoderm. (yourdictionary.com)
  • In L. gigantea , sall presents maternal expression, although later on the expression is restricted to the A and B quadrants during gastrulation and larval stage. (biomedcentral.com)
  • We demonstrate that the zebrafish bozozok (boz) locus is required at the blastula stages for formation of the embryonic shield, the equivalent of the gastrula organizer and expression of multiple organizer-specific genes. (zfin.org)
  • In C. fornicata , sall has no maternal expression and it is expressed mainly in the A, C and D quadrants during blastula stages and in an asymmetric fashion during the larval stage. (biomedcentral.com)
  • The embryonic period of human development was divided into eight main stages described as 1-unicellular, 2-blastomere stage, 3-blastoderm stage, 4-bilaminar stage, 5-trilaminar stage, 6-early somite stage, 7-stage of limb development, 8-late embryonic stage. (ventolaphotography.com)
  • In rabbit, Shh induced right-sided marker gene expression only in the 2 somite stage, whereas in chick this inductive effect lasted from stage 4 until up to the 1-2 somite stage. (studylibde.com)
  • The systemic inhibition of FGF8 signalling with SU5402 caused loss of LR marker gene expression prior to the 2 somite stage but did not influence ciliogenesis or the setup of cilia-driven leftward flow. (studylibde.com)
  • Taken together, this suggested a dual function for FGF8 signalling: First, it is needed to confer competence to the lateral plate and second, during the 2 somite stage, it is needed for the transfer of LR cues. (studylibde.com)
  • Stacked bar graphs showing different patterns of enriched spatial expression based on RNA-seq of dissected gastrula tissues (Blitz et al. (xenbase.org)
  • Reference genes are used for the normalization of gene expression because of the stability of expression levels among different tissues, different developmental stages, or under various treatments [ 5 ]. (biomedcentral.com)
  • Tissue development is a key process for life starting from the earliest embryonic stages during which cells differentiate into later organs composing an entire body. (exeter.ac.uk)
  • The staging of early embryogenesis is a basic step for developmental biology. (bioone.org)
  • These human complete SEMs demonstrated developmental growth dynamics that resemble key hallmarks of post-implantation stage embryogenesis up to 13-14 days after fertilization (Carnegie stage 6a). (nature.com)
  • The importance of DNA repair is illustrated by embryonic lethality at this stage after ablation of the genes involved. (sckcen.be)
  • Therefore, it is possible that knowledge of the developmental stages of the zebrafish might be applicable to the loach. (bioone.org)
  • The winged-helix transcription factor Xfoxi1a is one of the earliest markers for the preplacodal region at the mid-neurula stage. (biologists.com)
  • 5%) at each stage showing transcripts that are downregulated or upregulated early (NF9-10) or late (NF10.5-12). (xenbase.org)
  • Scanning electron microscope image of Strongylocentrotus drobachiensus [sea urchin] at the gastrula stage. (cellimagelibrary.org)
  • Egg incubation and yolk-sac larval development was performed in three laboratory tanks (of 35 l each) at temperature condition of 21°C. For the study of ontogeny, were sampled in the embryonic stage 25 eggs every 30 min and in yolk-sac larval stage, 10 specimens every 4 h. (scialert.net)
  • The stages of embryonic development differ in various chordates, yet the chief phases are basically similar in all. (biologydiscussion.com)
  • William Harvey (1578- 1657) and Marcello Malpighi (1628-1694) contributed information on the various stages of the development of chick on the basis of their studies with the help of simple lens. (biologydiscussion.com)
  • What are the stages of embryonic development in humans? (ventolaphotography.com)
  • first stages of human development. (ventolaphotography.com)
  • It therefore facilitated stable development of laterality in most cases also when presomite stages were taken into culture. (studylibde.com)
  • This very characteristic larva is termed a planula , but though very uniform externally, the planulae of different species, or of the same species at different periods, do not always represent the same stage of embryonic development internally. (yourdictionary.com)
  • If the development is indirect it includes larva stages. (biozoomer.com)
  • At 10 hpf, the germ ring and the embryonic shield were formed, indicating the stage of early gastrula. (bioone.org)
  • The animal pole is to the top for the early stages, and anterior is to the top later, except for the two animal polar (AP) views shown below their side view counterparts for germ-ring and shield gastrulas. (ucsd.edu)
  • After shield stage, the views are of the embryo's left side, but before the shield arises one cannot reliably ascertain which side is which. (ucsd.edu)
  • Arrowheads indicate the early appearance of some key diagnostic features at the following stages: 1 k-cell: YSL nuclei. (ucsd.edu)
  • When the nauplii hatch from the tiny eggs and go through all the nauplii stages within a few days to develop sexual maturity after about two weeks and finally bury permanent eggs in the sand themselves. (triopsgalaxy.de)
  • Separated channels for the Nkx2-5 -en ( E" ) and Nkx2.5 protein ( E''' ). ( F ). Location of the Isl1 enhancer in chick and mouse genomes. (elifesciences.org)
  • Migration of Nkx2-5 -en + cells from outside the cardiac crescent towards the heart tube. (elifesciences.org)