spermatocyte
male germ cell (arising from the spermatogonium) before it is mature
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
Spermatocyte
[Gr. spermatos - seed, semen; Gr. kytos - a hollow vessel; modern usage cyt- denotes a cell].
A cell that undergoes the first meiotic division in male animals. See secondary spermatocyte.
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spermatocytes
[Gk. sperma, seed + kytos, vessel]
The diploid (2n) cells formed by the enlargement and differentiation of the spermatogonia; they give rise by meiotic division to the spermatids.
spermatogonia ...
primary spermatocyte
A diploid cell formed after a diploid spermatogonium underwent mitosis. The primary spermatocyte is arrested in Prophase of Meiosis I. It will complete meiosis to form two haploid secondary spermatocytes.
spermatocyte A growth stage of a male reproductive cell; gives rise to a spermatid.
The primary spermatocytes contain twice the DNA of a normal body cell (2 × 2N). Each primary spermatocyte divides into two secondary spermatocytes containing two sets of chromosomes (2 × 1N).
The primary germ cells undergo division and produce a number of cells termed spermatogonia, and from these the primary spermatocytes are derived.
The cell that undergoes meiosis is a primary spermatocyte. The first meiotic division produces two secondary spermatocytes and the second division produces spermatids, which mature to form sperm.
Meiosis of each spermatocyte produces 4 haploid spermatids. This process takes over three weeks to complete.
Then the spermatids differentiate into sperm, losing most of their cytoplasm in the process.
Spermatocytogenesis is the male form of gametocytogenesis and results in the formation of spermatocytes possessing half the normal complement of genetic material.
The expression of mouse XPF in pachytene spermatocytes corroborates other indications that XPF has an additional role in genetic recombination during meiosis.
spermatogenesis The development of sperm cells from spermatocytes to mature sperm, including meiosis. PICTURE
spicules Needle-shaped skeletal elements in sponges that occur in the matrix between the epidermal and collar cells.
a cell capable of dividing to produce gametes, e.g., a spermatocyte or oocyte.
Synonym: gamont.
Seminiferous tubules are inside each testis, and are where sperm are produced by meiosis. About 250 meters (850 feet) of tubules are packed into each testis. Spermatocytes inside the tubules divide by meiosis to produce spermatids that in turn ...
In spermatogenesis, all four resulting cells form functional spermatocytes. In the female, in oögenesis, only one of the four becomes the functional oocyte. The other three cells are called polar bodies and are discarded.
 See also: Sperm, Cell, Division, Cells, Vision
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