IB Biology Topic B2.3.10 Adaptations of Sperm and Egg Cells Revision Notes (HL)

IB Biology Topic B2.3.10 Adaptations of Sperm and Egg Cells Revision Notes (HL) | RevisionDojo

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Sperm and Egg Cells Are Shaped by Their Jobs: Delivery Versus Provisioning

Sperm and egg cells are gametes, the specialised haploid reproductive cells that fuse at fertilisation.
The sperm is built to travel and deliver DNA, while the egg is built to provision and protect the new life.

Note

Both gametes are haploid, carrying one set of chromosomes.
Each adaptation below links a structure to the function it makes possible.

Sperm Adaptations: A Stripped-Down Cell Built to Swim

Flagellum (Tail) for Motility
1. The long flagellum beats with a whip-like motion to propel the sperm forward.
2. This lets the sperm swim through the female reproductive tract toward the egg.
Midpiece Packed with Mitochondria
1. The midpiece is packed with mitochondria.
2. These generate the ATP that powers the flagellum over the long swim.
Acrosome Filled with Hydrolytic Enzymes
1. The acrosome is a cap over the head that holds hydrolytic (digestive) enzymes.
2. These enzymes digest the egg's coatings so the sperm can reach the membrane.
Haploid Nucleus in a Streamlined Head
1. The head carries a haploid nucleus with the father's single set of chromosomes.

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Note

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IB Biology Topic B2.3.10: Adaptations of Sperm and Egg Cells Notes

Sperm and Egg Cells Are Shaped by Their Jobs: Delivery Versus Provisioning

Sperm Adaptations: A Stripped-Down Cell Built to Swim

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Sperm and Egg Cells Are Shaped by Their Jobs: Delivery Versus Provisioning

Sperm Adaptations: A Stripped-Down Cell Built to Swim

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic B2.3.10: Adaptations of Sperm and Egg Cells Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Sperm and Egg Cells Are Shaped by Their Jobs: Delivery Versus Provisioning

Sperm Adaptations: A Stripped-Down Cell Built to Swim

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Sperm and Egg Cells Are Shaped by Their Jobs: Delivery Versus Provisioning

Sperm Adaptations: A Stripped-Down Cell Built to Swim

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account