Multiple choice Haploid set of chromosome is found in: primary spermatocyte secondary spermatocyte primordial germ cell spermatogonium Reveal answer Fill a bubble to check yourself B Correct answer Explanation During meiosis, primary spermatocytes (diploid) undergo meiosis I to produce secondary spermatocytes, which are haploid (n). Secondary spermatocytes then undergo meiosis II to produce spermatids. Spermatogonia and primordial germ cells are diploid.