FertilizationFertilization

SpermSperm

What is involved in the maturation of a sperm What is involved in the maturation of a sperm cell?cell?

SpermSperm

SpermSperm

SpermSperm

How does flagellar structure contribute to sperm How does flagellar structure contribute to sperm motility?motility?

EggEgg

Why is egg so much larger than sperm?Why is egg so much larger than sperm? yolk proteinsyolk proteins ribosomesribosomes t-RNAt-RNA m-RNAm-RNA morphogenic factorsmorphogenic factors protective chemicalsprotective chemicals

EggEgg

What are some of the What are some of the structural components structural components of the egg?of the egg?

EggEgg

When sperm enters at what meiotic stage is the egg?When sperm enters at what meiotic stage is the egg?

GametogenesisGametogenesis

Sperm AttractionSperm Attraction

What is chemotaxis?What is chemotaxis?

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Sperm AttractionSperm Attraction

What is a sperm-activating peptide?What is a sperm-activating peptide?

Sperm – Egg InteractionSperm – Egg Interaction

What is involved in the acrosomal reaction in What is involved in the acrosomal reaction in sea urchins?sea urchins?

Sperm – Egg InteractionSperm – Egg Interaction

What role does the What role does the bindin protein play in bindin protein play in this interaction?this interaction?

Sperm – Egg InteractionSperm – Egg Interaction

How does gamete How does gamete recognition and recognition and binding occur in binding occur in mammals?mammals?

Sperm – Egg InteractionSperm – Egg Interaction

What follows the initial penetration of egg by the What follows the initial penetration of egg by the sperm?sperm?

Sperm – Egg InteractionSperm – Egg Interaction

What makes this What makes this interaction in interaction in mammals different?mammals different?

Preventing PolyspermyPreventing Polyspermy

Why is polyspermy a Why is polyspermy a problem?problem?

Preventing PolyspermyPreventing Polyspermy

What two mechanisms exist in sea urchins to What two mechanisms exist in sea urchins to prevent polyspermy?prevent polyspermy?

Preventing PolyspermyPreventing Polyspermy

Preventing PolyspermyPreventing Polyspermy

How is the cortical granule reaction How is the cortical granule reaction different in mammals?different in mammals?

Why is calcium so important to the cortical Why is calcium so important to the cortical granule reaction?granule reaction?

Egg ActivationEgg Activation

How does egg metabolism respond to How does egg metabolism respond to stimulation by sperm?stimulation by sperm?

Egg ActivationEgg Activation

What signaling pathway releases intracellular What signaling pathway releases intracellular calcium ion concentration?calcium ion concentration?

Fusion of Genetic MaterialFusion of Genetic Material

What does the sperm contribute to the What does the sperm contribute to the developing embryo?developing embryo?

What must happen for fusion to occur in What must happen for fusion to occur in sea urchins?sea urchins?

How is the fusion different in mammals?How is the fusion different in mammals?

Rearrangement of Egg CytoplasmRearrangement of Egg Cytoplasm

What kind of cytoplamic rearrangement occurs What kind of cytoplamic rearrangement occurs as a result of fertilization?as a result of fertilization?