[Campbell Biology P.1089] If a mature sperm nucleus is directly injected into a mature oocyte... | Practice Question

If a mature sperm nucleus is directly injected into a mature oocyte, which of the following biological processes would be bypassed?

  • A: Sperm capacitation and acrosome reaction
  • B: The second meiotic division of the oocyte
  • C: The formation of the male pronucleus
  • D: The initial stages of spermatogenesis

Explanation

Direct injection of a sperm nucleus into an oocyte bypasses the natural requirements for sperm to undergo capacitation physiological changes enabling fertilization and the acrosome reaction release of enzymes to penetrate egg layers . These processes are crucial for normal fertilization where sperm must traverse the female reproductive tract and egg coverings.