Gametogenesis

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Gametogenesis

• Gametes develop in the gonads (sex cells)

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• Their are 2 types of gametogenesis

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Spermatogenesis

• Production of sperm in the testes
• Produce 4 sperm from one cell
• Meiosis

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Male Reproductive System
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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

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Female Reproductive System
Lastly the sperm and egg meet here for
fertilization
Sperm must pass through the uterus 2nd
Sperm Enters the vagina 1st
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OviductFertilization occurs here
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Zygote

• Zygote is a fertilized egg.
• A fertilized egg becomes an embryo as soon as the
  first cleavage occurs.

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Internal Ferilization

• Chance of zygote survival is increased greatly

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External Fertilization

• Zygotes chance of survival decreases
  significantly

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