Navigation Links
Spermatid


The term spermatid refers to the haploid male germ cell that results from secondary spermatocyte division. As a result of meiosis, each spermatid contains only half of the genetic material present in the original primary spermatocyte.

When formed, early round spermatids must undergo further maturational events in order to develop into spermatozoa, a process termed spermiogenesis (also termed spermeteliosis). The spermatids begin to grow a tail, develop a thickened mid-piece where the mitochondria become localised and form an acrosome. Spermatid DNA also undergoes packaging, becoming highly condensed. The DNA is packaged firstly with specific nuclear basic proteins, which are subsequently replaced with protamines during spermatid elongation. The resultant tightly packed chromatin is transcriptionally inactive.


'"/>


(Date:8/19/2019)... ... August 19, 2019 , ... Since the ... of ultra-thin two dimensional slices which are placed on microscope slides, stained and ... tissues and complicated features such as vasculature and thus researchers in the last ...
(Date:8/14/2019)... ... August 14, 2019 , ... Carterra® ... they have opened a Customer Experience Center (CEC) and office in Munich, Germany. ... office. , The Munich CEC will be a place for researchers throughout Europe ...
(Date:8/14/2019)... Calif. (PRWEB) , ... August 13, 2019 , ... Dr. Julie Reck of Veterinary ... to her patients. Her first stem cell patient, her own geriatric Australian Shepherd, ... According to Dr. Reck, Simon wanted to play but his body was weak, and he ...
Breaking Biology News(10 mins):
Other biology definition