Human Embryology Lecture: Origins of Body Form in the First Month
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Questions and Answers

What is the result of fertilization?

  • Restoration of diploid number of chromosomes (correct)
  • Determination of the sex of the embryo
  • Initiation of cleavage
  • Formation of male pronucleus

    • What determines the sex of the embryo?

  • Initiation of cleavage
  • Formation of male pronucleus
  • Stimulation of the 2nd maturation division
  • Determination of the sex chromosome carried by the sperm (correct)

    • What prevents fertilization of the same ovum by more than one sperm?

  • Zona and cortical reactions (correct)
  • Initiation of cleavage
  • Formation of male pronucleus
  • Penetration of the head & neck of the sperm into the oocyte

    • What is cleavage or segmentation of the zygote?

    <p>Repeated mitosis converting a unicellular zygote to a multicellular mass</p> Signup and view all the answers

    What keeps blastomeres adherent together and prevents their separation?

    <p>Zona and cortical reactions</p> Signup and view all the answers

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