Spermatid - wikipedia Spermatid Spermatid Germinal epithelium of the testicle. 1 : basal lamina 2 : spermatogonia 3 : spermatocyte 1st order 4 : spermatocyte 2nd order 5 : spermatid 6 : mature spermatid 7 : Sertoli cell 8 : tight junction ( blood testis barrier ) Transverse section of a tubule of the testis of a rat. × 250. Identifiers MeSH A05. 360.490. 890.860 Anatomical terminology ( edit on Wikidata ) The spermatid is the haploid male gametid that results from division of secondary spermatocytes. As a result of meiosis, each spermatid contains only half of the genetic material present in the original primary spermatocyte. Spermatids are connected by cytoplasmic material and have superfluous cytoplasmic material around their nuclei. When formed, early round spermatids must undergo further maturational events to develop into spermatozoa, a process termed spermiogenesis ( also termed spermeteliosis ). The spermatids begin to grow a living thread, 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. In 2016 scientists at Nanjing Medical University claimed they had produced cells resembling mouse spermatids artificially from stem cells. They injected these spermatids into mouse eggs and produced pups. Contents 1 DNA repair 2 Additional images 3 References 4 External links DNA repair As postmeiotic germ cells develop to mature sperm they progressively lose the ability to repair DNA damage that may then accumulate and be transmitted to the zygote and ultimately the embryo. In particular, the repair of DNA double - strand breaks by the non-homologous end joining pathway, although present in round spermatids, appears to be lost as they develop into elongated spermatids. Additional images Scheme showing analogies in the process of maturation of the ovum and the development of the Genyo spermatids ( young spermatozoa ). References Jump up ^ Cyranoski, David ( 25 February 2016 ). `` Researchers claim to have made artificial mouse sperm in a dish ''. Nature. doi : 10.1038 / nature. 2016.19453. Retrieved 4 March 2016. Jump up ^ Marchetti F, Wyrobek AJ ( 2008 ). `` DNA repair decline during mouse spermiogenesis results in the accumulation of heritable DNA damage ''. DNA Repair ( Amst. ). 7 ( 4 ) : 572 -- 81. PMID 18282746. doi : 10.1016 / j. dnarep. 2007.12. 011. Jump up ^ Ahmed EA, Scherthan H, de Rooij DG ( 2015 ). `` DNA Double Strand Break Response and Limited Repair Capacity in Mouse Elongated Spermatids ''. Int J Mol Sci. 16 ( 12 ) : 29923 -- 35. PMC 4691157. PMID 26694360. doi : 10.3390 / ijms161226214. External links Histology image : 17804loa -- Histology Learning System at Boston University - `` Male Reproductive System : testis, early spermatids '' Histology image : 17805loa -- Histology Learning System at Boston University - `` Male Reproductive System : testis, late spermatids '' Histology at okstate.edu Male reproductive system Internal Seminal tract Testes layers Tunica vaginalis Tunica albuginea Tunica vasculosa Appendix Mediastinum Lobules Septa Leydig cell Sertoli cell Blood -- testis barrier Spermatogenesis Spermatogonium Spermatocytogenesis Spermatocyte Spermatidogenesis Spermatid Spermiogenesis Spermatozoon Other Seminiferous tubules Tubuli seminiferi recti Rete testis Efferent ducts Epididymis Appendix Stereocilia Paradidymis Spermatic cord Vas deferens Ampulla Ejaculatory duct Accessory glands Seminal vesicles excretory duct Prostate Urethral crest Seminal colliculus Prostatic utricle Ejaculatory duct Prostatic sinus Prostatic ducts Bulbourethral glands External Penis root Crus Bulb Fundiform ligament Suspensory ligament body Corpus cavernosum Corpus spongiosum glans Foreskin Frenulum Corona fascia superficial deep Tunica albuginea Septum of the penis Urinary tract Internal urethral orifice Urethra Prostatic Intermediate Spongy Navicular fossa External urethral orifice Lacunae of Morgagni Urethral gland Scrotum layers skin Dartos External spermatic fascia Cremaster Cremasteric fascia Internal spermatic fascia Perineal raphe Scrotal septum Retrieved from `` https://en.wikipedia.org/w/index.php?title=Spermatid&oldid=789688339 '' Categories : Reproductive system Germ cells Andrology Hidden categories : Medicine infobox template using GraySubject or GrayPage Talk Contents About Wikipedia Català Čeština Deutsch Español Français Ido Português Русский Edit links This page was last edited on 8 July 2017, at 22 : 48. About Wikipedia

Question: spermatids mature into spermatozoa by the process of
Answer: spermiogenesis