General Knowledge – Zoology

  • Reproduction is the only means by which the continuity of a species is maintained.


  • In animals the gametes develop in the gonads by an elaborate process called gametogenesis.


  • Sperm is the male gamete. It is highly specialized morphologically as well as physiologically for active motility.


  • Egg is the female gamete. It contains almost all the materials which is essential for the entire process of development.


  • Fertilization is the union of sperm and egg resulting in the formation of zygote.


  • Fertilization maintains the diploid number of chromosomes.


  • Cleavage is the segmentation of the zygote into blastomeres.


  • Gastrulationis the transformation of blastula into gastrula.




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