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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