Crossword clues for spermatocyte
spermatocyte
The Collaborative International Dictionary
Spermatocyte \Sper"ma*to*cyte\, n. [Spermato- + Gr. ???? a hollow vessel.] (Physiol.) Same as Spermoblast.
Wiktionary
n. (context cytology English) A male gametocyte, from which a spermatozoon develops.
WordNet
n. a male gametocyte that develops into four spermatids
Wikipedia
Spermatocytes are a type of male gametocyte in animals. They derive from immature germ cells called spermatogonia. They are found in the testis, in a structure known as the seminiferous tubules. There are two types of spermatocytes, primary and secondary spermatocytes (Figure 1). Primary and secondary spermatocytes are formed through the process of spermatocytogenesis (Figure 3).
Primary spermatocytes are diploid (2N) cells containing 46 chromosomes. After Meiosis I, two secondary spermatocytes are formed. Secondary spermatocytes are haploid (N) cells that contain 23 chromosomes.
All male animals produce spermatocytes, even hermaphrodites such as C. elegans, which exist as a male or hermaphrodite. In hermaphrodite C. elegans, sperm production occurs first and is then stored in the spermatheca. Once the eggs are formed, they are able to self-fertilize and produce up to 350 progenies.
Usage examples of "spermatocyte".
Also, the biolabs would like samples of his body tissues, particularly the spermatocyte and sperm cells.
Toward morning the scar-faced chief scientist spoke to Erith, and Leo learned they wanted to anesthetize him and remove some spermatocyte and sperm cells.
Our plan was to insert a diploid nucleus from one of my primary spermatocytes into a human ovum and, in turn, insert that ovum into the uterus of a human female.
And although sequencing and cross-matching of hundreds of thousands of samples failed to provide any evidence of extraneous DNA sequences in the Y chromosomes of spermatocytes of men from the areas affected by the plague, this hypothesis still held sway a year later, simply because no one had put forward a workable alternative.
But the steps necessary to achieve exact diploid complements would be these: There must be intervention in gametogenesis in each parent just before meiotic division-reduction of chromosome number-that is, one would start with primary spermatocytes and primary oocytes, unreduced diploids.
Each primary spermatocyte gives rise by meiosis to two secondary spermatocytes, each of which in turn divides into two spermatids.