The Site of Spermatogenesis and the Functional Cell Types Participating (Fig. 1). Spermatogenesis is the process of producing sperm with half the number of chromosomes (hapliod) as somatic cells. The process of spermatogenesis then allows the recombination of male and female haploid gametes at fertilization. This provides genetic contributions from both parents without increasing the number of chromosomes each generation.
ISO, founded in 1947, is a worldwide federation of national standards bodies from some 100 countries, with one standards body representing each member country. The American National Standards Institute (ANSI), for example, represents the United States.
An ISO image is an archive file of an optical disc, a type of disk image composed of the data contents from every written sector on an optical disc, including the optical disc file system.ISO image files usually have a file extension of .iso.The name ISO is taken from the ISO 9660 file system used with CD-ROM media, but what is known as an ISO image might also contain a UDF (ISO/IEC 13346) file system (commonly used by DVDs and Blu-ray Discs).SO images can be created from optical discs by disk imaging software, or from a collection of files by optical disc authoring software, or from a different disk image file by means of conversion.