Explanation

Secondary spermatocytes. The first stage in spermatogenesis in which the chromosome number becomes half Spermatogenesis Formation of spermatozoa from spermatogonia Spermatogenesis has four phase (i) Multiplication Phase Male germ cells (spermatogonia) present on the inside wall of seminiferous tubules multiply by mitotic division and increase their number. (ii) Growth Phase One spermatogonia stop dividing and increase its size called primary spermatocytes, which is diploid. (iii) Multiplicative Phase Primary spermatocytes divide by meiosis to give four haploid spermatids. (iii) Differanation Phase Changing of spermatids to spermatozoa by the process called spermatogenesis. Releasing of sperm from seminiferous tubules called spermiation