CK-12 Foundation
Ck 12: Gametogenesis, Advance
[Free Registration/Login may be required to access all resource tools.] Did you know the ostrich egg is just one cell? Tutorial describes the process of gametogenesis. and also compares and contrasts spermatogenesis and oogenesis.
CK-12 Foundation
Ck 12: Biology: Human Sperm
[Free Registration/Login may be required to access all resource tools.] Discusses how sperm are produced.