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Can Sperm Fertilize a Polar Body?

Published in Biology 1 min read

No, sperm cannot fertilize a polar body.

Understanding Polar Bodies and Fertilization

  • Polar bodies are small cells produced during oogenesis, the process of egg cell formation. They are essentially discarded genetic material from the developing egg.
  • Fertilization occurs when a sperm cell successfully penetrates and fuses with an egg cell, combining their genetic material to form a zygote.

Why Sperm Cannot Fertilize Polar Bodies

  • Genetic makeup: Polar bodies lack the complete set of chromosomes necessary for a viable embryo. They contain only half the genetic material of a normal egg cell.
  • Structural differences: Polar bodies are significantly smaller than egg cells and lack the essential structures required for fertilization, such as the zona pellucida, a protective layer surrounding the egg.

In Conclusion

The genetic and structural differences between polar bodies and egg cells make it impossible for sperm to fertilize them.

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