Egg activation in physiological polyspermy.

  title={Egg activation in physiological polyspermy.},
  author={Yasuhiro Iwao},
  volume={144 1},
Fertilization is indispensable not only for restoring diploid genomes but also for the initiation of early embryonic cell cycles in sexual reproduction. While most animals exhibit monospermy, which is ensured by polyspermy blocks to prevent the entry of extra sperm into the egg at fertilization, several animals exhibit physiological polyspermy, in which the entry of several sperm is permitted but only one sperm nucleus participates in the formation of a zygote nucleus. Polyspermy requires that… CONTINUE READING


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