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Biology  Elongation factor  Embryo sac

Early development of an individual from a fertilized egg (zygote).

embryo sac
the female gametophyte of antiospermous plants, within the embryo begins development
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

Embryonic Development: Putting on the finishing touches
Insect (Drosophila) and frog (Xenopus) development (and probably that of animals in general) passes through three rather different (although often overlapping) phases: ...

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THE TERM Embryology, in its widest sense, is applied to the various changes which take place during the growth of an animal from the egg to the adult condition: it is, however, ...

An embryonic cell that can replicate indefinitely, transform into other types of cells, and serve as a continuous source of new cells.

Embryos and mouse strains
Wild-type embryos were from ICR outbred mice (Harlan-Sprague-Dawley, Indianapolis, USA). The TOPGAL mouse line was kindly provided by Elaine Fuchs [19].
Production of transgenic mice ...

embryo Term applied to the zygote after the beginning of mitosis that produces a multicellular structure.
embryo sac Alternate term applied to the angiosperm female gametophyte contained within a megaspore. PICTURE ...

Embryonic stem (ES) cells: Cell lines derived from early embryos that have the potential to differentiate into all types of somatic cells as well as to form germ line cells, and hence whole animals, when injected into early embryos.

Embryology is the study of the early development of organisms.
Epidemiology is the study of the demographics of disease processes, and includes, but is not limited to, the study of epidemics. Public health ...

(em-bree-oh) [Gk. en, in + bryein, to swell]
A developing stage of multicellular organisms; in humans, the stage in the development of offspring from the first division of the zygote until body structures begin to appear; ...

embryo The earliest of stage of development of a plant or animal. In humans, embryo is used up to the third month of pregnancy. Thereafter, once the basic body shape has formed, the term fetus is employed. PICTURE OF CHICK EMBRYO ...

Embryology: blastula, ectoderm, endoderm, fertilization, gestation period.

embryo [Gr. embryon]. The stage in a developing organism after cleavage has occurred and before hatching or birth.

embryo. The small plantlet within the seeds in almond, the embryo develops into the kernel.
endoparasite. A parasite that lives inside its host.

embryo forms when all the organs of the body have taken shape.
embryology the study of embryonic development.
endergonic reaction chemical reactions in which energy is obtained and trapped from the environment.

Embryonic stem cell ethical debate
A blastocyst is a stage of development of an embryo when it is around five days old and made up of about 100 cells.

embryology - study of embryogenesis, the development of animals and plants from fertilization to birth/hatching.

Embryonic development of the vertebrate brain reflects its evolution from three anterior bulges of the neural tube.

Embryo: A developing offspring during the period when most of its internal organs are forming. It is called fetus in the next stage of development.

Embryo and Seed Development
Embryogenesis, the formation of a multicellular embryo from a single-celled zygote, is one of the most dramatic and best-characterized aspects of plant development.

Another difficulty in comparing traits between species rests on the fact that homologous structures not present in the adult organism often do appear in some stage of embryonic development.

Embryonic stem (ES) cells
An embryonic cell that can replicate indefinitely, transform into other types of cells, and serve as a continuous source of new cells.
Endonuclease ...

Embryonic germ layers begin to be committed toward distinct developmental fates
Cell migrations are a prominent feature of this developmental stage ...

Embryonic stem cells can be cultured in vitro; under certain conditions they can be induced to differentiate into various cell types.

Embryologists select which embryos will be placed into the uterus. Therefore they decide the fate of new individuals as they choose which ones will survive and which ones will die.

Embryonic stem cells have the other advantage that they are multipotent and can turn into many different types of tissue in culture and therefore it's possible to learn from studying embryonic stem cells how differentiation occurs.

embryo The early developmental stage that, through embryological development, ultimately becomes an adult individual.

embryology (the branch of biology that studies the formation and early development of living organisms)
bionomics; ecology; environmental science (the branch of biology concerned with the relations between organisms and their environment) ...

Embryo an animal or plant that develops from a zygote prior to birth, hatching or germination
Emulsion test a biochemical test that can be used to show the presence of lipid
Endocrine glands a gland that secretes a hormone directly into the blood ...

Embryological development reveals a unity of plan. During development, all vertebrates have a notochord and paired pharyngeal pouches. In fishes and amphibian larvae, the pouches become gills.

Embryology - the study of the development of embryo (from fecondation to birth). See also topobiology.
Entomology - the study of insects ...

in embryology, delimitation of a specific area in an organ-forming field, giving definite shape and limits to the organ primordium.
Please contribute to this project, if you have more information about this term feel free to edit this page ...

The embryo proper begins to form from an inner cell mass within the blastocyst. Some parts of the blastocyst will form the extra embryonic membranes such as the amnion, chorion and parts of the placenta.

7.4 Embryonic heart cells
Individual cells from the chick heart start beating spontaneously when grown in culture. Once good "electrical" connections are formed between adjacent cells, entire sheets of cells begin beating in unison.

Embryonic primordium from which a specific part of the organism develops. The rudimentary basis of an organ in an embryo.
Related Terms:
Early cells that serve as the mitotic progenitor of an organ in organogenesis.

Isolate embryonic stem cells that originated from male brown mice with a normal OhNo gene (blue).
2. Add Inactive Gene With Marker
To these cells, add a copy containing a mutated, inactive OhNo gene (red), and a drug resistance marker gene (pink).

The growing embryo releases a hormone called gibberellic acid and some enzymes are produced and released in response to this.

Most die as embryos or fetuses. Occasionally an infant survives for a few days.
Abnormalities of the Sex Chromosomes
Turner Syndrome - XO ...

ES cells Embryonic stem cells. Cultured cells derived from the pluripotent inner cell mass of blastocyst stage embryos. Used for gene targeting by homologous recombination (see Chapter 6).
See ES Cells in the MGI Glossary.

en 1 2 3 4 5 6 7 8 9
enclosed 1 2 3 4
encoded 1 2 3
encyclopedia 1 2 ...

NHGRI Narrower terms: clone, embryonic stem cells ES, gametes, germ cells, hematopoietic stem cells, Mesenchymal Stem Cells MSC, pluripotent stem cells, somatic cell, stem cells, CHO cells Chinese Hamster Ovary cells, ...

Growth faster than embryo in early pregnancy
Development increases in complexity ...

Chorionic villus sampling -- an invasive prenatal diagnostic procedure involving removal of villi from the human chorion to obtain chromosomes and cell products for diagnosis of disorders in the human embryo.

The Visible Embryo: The Visible Embryo teaches the first four weeks of human development from fertilization to somite development. Very easy to follow.

There are also embryonic stem cells, and these are derived from three and a half days in the mouse and about six- to eight-day embryos in people, and these are cells with even more potential than the adult cells, ...

An individual mouse, or other mammal, that is derived from the fusion of two or more preimplantation embryos or an embryo and ES cells.
Defined for pairs of alleles.

There are differences in the appearance of early vertebrate embryos. Amphibians rapidly form a ball of cells in early development. Birds, reptiles and mammals form a disk.

Paired-box containing genes found in many species that are involved in regulation of early embryogenesis. Pax genes code for (DNA binding) transcription factors.

Embryology if you at the development of different kinds of creatures you can see changes as they grow and develop from the fertilized egg to the full juvenile offspring.

The most widely known source of stem cells is human/animal embryos, prompting controversy over stem cell research based on bioethics and the view that life begins at conception.

Illustrated in Figure 2 is a fluorescence digital image of a Swiss mouse embryo fibroblast cell stained with fluorescent probes targeting the nucleus (blue), mitochondria network (red), ...

Seeds are a protective structure that lets a plant embryo survive for long periods of time before it germinates. Seeds have food sources pre-packaged for plant embryos to provide for an embryo's needs in early growth.

The procedure by which one makes a transgenic mouse involves the injection of DNA into a fertilized embryo at the pro-nuclear stage. The DNA is generally cloned, and may be experimentally altered.

Fertilization can result in embryos that are 2n + 1 (a "trisomy") or 2n - 1.
Abnormal copy numbers of one or more chromosomes is usually, but not always, fatal (Example: Down syndrome) ...

Linear DNA is injected into a fertilized embryo at the pro-nuclear stage and may be incorporated into the genome. Injected embryos are implanted into a foster mother. Progenitors are screened for transgene in their genome.

Blastocyst the hollow ball stage of embryonic development
(blasto = bud‚ sprout)
Botanist a person who studies plants
(botan = grass‚ pasture) ...

inflammation of the organ in the uterus to which the embryo is attached ...

A variant of clinical magnetic resonance imaging, which has been adapted for non-invasive studies of small samples that range in size from rats to frog embryos. Typical spatial resolutions are in the range of tens to hundreds of micrometres.

Zygote: A fertilized egg. Or the diploid cell that results from the joining of two haploid gametes (sperm and egg) during sexual reproduction, that will cleave to form an embryo. See also fertilization, gamete.

They produce no embryos, but reproduce by means of tiny reproductive packages called spores. These spores are extraordinarily light and mobile and are propagated widely by air currents and by attachment to any mobile object.

Fertilization of a haploid ovum by a haploid sperm results in formation of a diploid embryo. Many microorganisms are haploid.
Haploinsufficiency — Refer to definition of ‘Hemizygous’ below.

See also: See also: Cells, Organ, Trans, Human, Cell

Biology  Elongation factor  Embryo sac

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