نتایج جستجو برای: zygote morphology

تعداد نتایج: 148549  

Journal: :Journal of bacteriology 1984
D P Bedard A W Li R A Singer G C Johnston

Diploid formation by haploid cells of Saccharomyces cerevisiae was tested during and after treatment with chemical agents which bring about arrest at the cell cycle regulatory step "start." All compounds, except sinefungin, allowed efficient mating. During sinefungin treatment, zygote formation, but not karyogamy, was affected.

Journal: :Current Biology 2014
Mark Blaxter

The handover from maternal to zygotic control has to be carefully orchestrated. In most animal embryos, maternal products drive early embryogenesis, and the genome of the zygote is only switched on later. However, in the nematode Ascaris the zygotic genome is never silent, and the maternal products are rapidly eliminated.

Journal: :Cell 2009
Nicholas K. Tonks

Catalytically inactive pseudophosphatases are able to signal in the absence of enzymatic activity. Analyzing the oocyte-to-zygote transition in the worm, Cheng et al. (2009) and Parry et al. (2009) now show how two pseudophosphatases, EGG-4 and EGG-5, can regulate signaling by the DYRK family kinase MBK-2.

Journal: :Engineering 2023

Recent advances in the basic sciences and epidemiology indicate that impacts of classically described cannabinoid genotoxicity may be much more clinically significant than previously supposed. Here we summarize evidence from epigenomics, recent epidemiological studies other areas exploring exponential many cannabinoids on cancer, congenital anomalies aging. Together these findings transgenerati...

2018
Laura A. Moody Steven Kelly Ester Rabbinowitsch Jane A. Langdale

One of the most important events in the history of life on earth was the colonization of land by plants; this transition coincided with and was most likely enabled by the evolution of 3-dimensional (3D) growth. Today, the diverse morphologies exhibited across the terrestrial biosphere arise from the differential regulation of 3D growth processes during development. In many plants, 3D growth is ...

2002
Brad Goodner Ralph S. Quatrano

It has been known for more than 100 years that when spherical zygotes of the brown alga Fucus are subjected to a gradient of light, the plane of the first cell division is always perpendicular to the light axis. As illustrated in Figure 1, the resulting cell plate divides the zygote into two unequal cells; the smaller rhizoid cell emerges from the shaded portion of the gradient, whereas the lar...

Journal: :Current Biology 2004
Nathalie Beaujean Geraldine Hartshorne Jennifer Cavilla Jane Taylor John Gardner Ian Wilmut Richard Meehan Lorraine Young

In mammals, active demethylation of sperm pronuclear DNA shortly after fertilisation is thought to be important for reprogramming subsequent embryonic development [1–3]. A further passive loss of methylation has been observed as DNA replicates between 2-cell and morula stages, with somatic cell levels being re-established at or after the blastocyst stage when differentiated lineages are first f...

Journal: :The Journal of reproduction and development 2008
Ali Cetinkaya Seref Erdogan

Intracellular pH-regulatory mechanisms are acquired by growing mouse oocytes with meiotic competence, and these mechanisms become fully active when the oocytes develop to the germinal vesicle (GV) stage as shown in CF1 and Balb/c strains mice. On the other hand, there is some evidence showing that intracellular pH-regulatory mechanisms are inhibited at the stages of Metaphase I (MI) and II (MII...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید