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Germ cell information


A germ cell is any cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive streak and migrate via the gut of an embryo to the developing gonads. There, they undergo meiosis, followed by cellular differentiation into mature gametes, either eggs or sperm. Unlike animals, plants do not have germ cells designated in early development. Instead, germ cells can arise from somatic cells in the adult, such as the floral meristem of flowering plants.[1][2][3]

  1. ^ Alberts B, Johnson A, Lewis J, Raff Mm Roberts K, Walter P (2002). Molecular biology of the cell. New York, Garland Science, 1463 p. ISBN 9780815335771.
  2. ^ Twyman RM (2001). Developmental biology. Oxford, Bios Scientific Publishers, 451p.
  3. ^ Cinalli RM, Rangan P, Lehmann R (February 2008). "Germ cells are forever". Cell. 132 (4): 559–562. doi:10.1016/j.cell.2008.02.003. PMID 18295574. S2CID 15768958.

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Germ cell

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A germ cell is any cell that gives rise to the gametes of an organism that reproduces sexually. In many animals, the germ cells originate in the primitive...

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Germ cell tumor

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Germ cell tumor (GCT) is a neoplasm derived from the primordial germ cells. Germ-cell tumors can be cancerous or benign. Germ cells normally occur inside...

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Gamete

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haploid cell that fuses with another haploid cell during fertilization in organisms that reproduce sexually. Gametes are an organism's reproductive cells, also...

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Somatic cell

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multicellular organism other than a gamete, germ cell, gametocyte or undifferentiated stem cell. Somatic cells compose the body of an organism and divide...

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Primordial germ cell migration

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germ cell (PGC) migration is the process of distribution of primordial germ cells throughout the embryo during embryogenesis. Primordial germ cells are...

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Ovarian cancer

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ovary is made up of three different cell types including epithelial cells, germ cells, and stromal cells. When these cells become abnormal, they have the ability...

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Germ layer

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A germ layer is a primary layer of cells that forms during embryonic development. The three germ layers in vertebrates are particularly pronounced; however...

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Germ cell neoplasia in situ

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Germ cell neoplasia in situ (GCNIS) represents the precursor lesion for many types of testicular germ cell tumors. The term GCNIS was introduced with the...

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Testicular cancer

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disease, and previous history of testicular cancer. More than 95% are germ cell tumors which are divided into seminomas and non-seminomas. Other types...

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Germ cell nest

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The germ cell nest (germ-line cyst) forms in the ovaries during their development. The nest consists of multiple interconnected oogonia formed by incomplete...

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Germ plasm

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effect is one-way: germ cells produce somatic cells, and more germ cells; the germ cells are not affected by anything the somatic cells learn or any ability...

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Oocyte

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ovocyte is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in a female...

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Teratoma

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testicular torsion, or hydrops fetalis. They are a type of germ cell tumor (a tumor that begins in the cells that give rise to sperm or eggs). They are divided...

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Sertoli cell

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Sertoli cells shortly after birth and stimulates the production of factors derived from Sertoli cells that control the development of the testes and germ cells...

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Germ

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Look up germ in Wiktionary, the free dictionary. Germ or germs may refer to: Germ (microorganism), an informal word for a pathogen Germ cell, cell that gives...

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Ovary

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organisms by which germ cells are formed, and it is likely an adaptation for removing DNA damages, especially double-strand breaks, from germ line DNA (see...

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Cell potency

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e.g., embryonic stem cells and iPSCs, to the incompletely or partially pluripotent cell that can form cells of all three germ layers but that may not...

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Scrotal ultrasound

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Primary intratesticular malignancy can be divided into germ cell tumors and non–germ cell tumors. Germ cell tumors are further categorized as either seminomas...

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Gametophyte

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of these cells is typically a germ cell and other cells may consist of a single tube cell which grows to form the pollen tube, sterile cells, and/or prothallial...

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Weismann barrier

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strict distinction between the "immortal" germ cell lineages producing gametes and "disposable" somatic cells in animals (but not plants), in contrast...

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Sperm

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complete. The process starts with the production of spermatogonia from germ cell precursors. These divide and differentiate into spermatocytes, which undergo...

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Germline

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population of a multicellular organism's cells that develop into germ cells. In other words, they are the cells that form gametes (eggs and sperm), which...

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Ploidy

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haploid number are equal; in humans, both are equal to 23. When a human germ cell undergoes meiosis, the diploid 46 chromosome complement is split in half...

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Mediastinal germ cell tumor

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Mediastinal germ cell tumors are tumors that derive from germ cell rest remnants in the mediastinum. Germ cell tumors most commonly occur in the gonad...

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Egg cell

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ovum is fertilized inside the female body. Human ova grow from primitive germ cells that are embedded in the substance of the ovaries. Each of them divides...

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Multicellular organism

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are called Weismannists, a separation between a sterile somatic cell line and a germ cell line evolved. However, Weismannist development is relatively rare...

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Germline mutation

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detectable variation within germ cells (cells that, when fully developed, become sperm and ova). Mutations in these cells are the only mutations that...

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Meiosis

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a special type of cell division of germ cells in sexually-reproducing organisms that produces the gametes, the sperm or egg cells. It involves two rounds...

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Testicular microlithiasis

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associated risk factors for testicular germ cell tumor, the increase in risk of concurrent diagnosis of testicular germ cell tumor, or testicular carcinoma-in-situ...

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Spermatogenesis

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spermatozoa develop from germ cells in the seminiferous tubules of the testicle. This process starts with the mitotic division of the stem cells located close to...

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