<prompt> During spermatogenesis, chromosome no. reduces to haploid at:-At mitosisMeiosis -IMeiosis-IINone of above  <response>: The first meiotic division is known as the reduction division in which each primary spermatocyte yields two secondary spermatoctyes. Each contains 23 Haploid chromosomes consist of two varieties 22X and 22Y. Here 22 are autosomes and X Y are sex chromosomes. 