Human Reproduction

Human Reproduction

Easy Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. The estrous cycle is a characteristic of








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    Estrous cycle is the characteristic of mammalian females other than primates. It is due to estrogen hormone. Estrous is the period during which ovulation occurs and the females mate with male.

    Correct Option: D

    Estrous cycle is the characteristic of mammalian females other than primates. It is due to estrogen hormone. Estrous is the period during which ovulation occurs and the females mate with male.

  1. At the end of first meiotic division, male sperm differentiates into








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    After first meiotic division primary spermatocyte (diploid) gives rise to two secondary spermatocytes (haploid).

    Correct Option: A

    After first meiotic division primary spermatocyte (diploid) gives rise to two secondary spermatocytes (haploid).

  1. Extrusion of second polar body from egg nucleus occurs








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    The entry of sperm stimulate the secondary oocyte to resume and complete the suspended meiosis II. This produces a haploid mature ovum and a second polar body. The second polar body and sperm tail immediately degenerate.

    Correct Option: A

    The entry of sperm stimulate the secondary oocyte to resume and complete the suspended meiosis II. This produces a haploid mature ovum and a second polar body. The second polar body and sperm tail immediately degenerate.

  1. Acrosome reaction in sperm is triggered by








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    Egg secretes fertilizin due to which acrosome of sperm secretes antifertilizin and due to their reaction sperm adheres to egg. The acrosome reaction is the reaction which occurs in the acrosome of the sperm as it approaches the zona pellucida. In mammals the acrosome reaction releases hyaluronidase and acrosin; their role in fertilization is not yet clear. It also alters a patch of pre-existing sperm plasma membrane so that it can fuse with the egg plasma membrane.

    Correct Option: D

    Egg secretes fertilizin due to which acrosome of sperm secretes antifertilizin and due to their reaction sperm adheres to egg. The acrosome reaction is the reaction which occurs in the acrosome of the sperm as it approaches the zona pellucida. In mammals the acrosome reaction releases hyaluronidase and acrosin; their role in fertilization is not yet clear. It also alters a patch of pre-existing sperm plasma membrane so that it can fuse with the egg plasma membrane.

  1. Freshly released human egg has








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    Human female has X X chromosomes. When eggs formed each egg carries 22 autosomes & one X chromosome. In human male each sperm carries 22 autosomes & either X or Y-chromosomes.

    Correct Option: B

    Human female has X X chromosomes. When eggs formed each egg carries 22 autosomes & one X chromosome. In human male each sperm carries 22 autosomes & either X or Y-chromosomes.