Spermatogonium
diploid
2n
46
Primary spermatocyte
diploid
2n
46
Secondary spermatocyte
haploid
1n
23
Spermatid
haploid
1n
23
Sperm
haploid
1n
23
Oogonium
diploid
2n
46
Primary oocyte
diploid
2n
46
Secondary oocyte
haploid
1n
23
Oogenesis
(if fertilization occurs)
Meiosis II
Second polar body
haploid
1n
23