Gametogenesis • Gametes develop in the gonads (sex cells)
Gametogenesis
• Gametes develop in the gonads (sex cells)
•Their are 2 types of gametogenesis
Spermatogenesis
• Production of sperm in the testes
• Produce 4 sperm from one cell
• Meiosis
Male Reproductive System
Oogenesis• Production of eggs in
the ovary.• Produce 4 eggs by
meiosis • One egg cells is
function• Three egg cells are
nonfunctional• The are known as
polar bodies
Female Reproductive System
Sperm Enters the vagina 1st
Sperm must pass through the uterus 2nd
Lastly the sperm and egg meet here for fertilization
OviductFertilization occurs here
Zygote
• Zygote is a fertilized egg.
• A fertilized egg becomes an embryo as soon as the first cleavage occurs.
Internal Ferilization
• Chance of zygote survival is increased greatly
External Fertilization
• Zygotes chance of survival decreases significantly