Question

What is fertilization?

Answer 1

         Fertilization simply known as Fusion of Gametes. The new organism or offspring starts to develop from this process. In case of human beings, it is fusion of sperms and egg cells. Where, sperms are male gametes and the egg cells are female gametes. The effect of this fusion is that formation of the zygote cell or fertilized egg. It is the actual initiation of development of new generation individual.
         The single spermatozoon penetrates the egg cell (female gamete). As the result, the zygote cell gets formed and it is also known as fertilized egg. We can say fertilization as conception, fecundation. Hence, the fertilization process is fusion of gametes only. Before this conception, egg remains unfertilized. Some names for the same process of fertilization are syngamy and impregnation.
        The embryos of all sexually reproducing organisms, develops from a single cell. Mutated DNA can only be passed to the next generation if it is present in a germ cell such as spermatozoa and ova, each of which contribute half of the DNA of the new organism.

Answer 2

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⚫Fertilization is usually known as the fusion of male gamete and female gamete to form a zygote.

⚫Here, the male gametes is sperm and female gamete is ovum.

⚫There are two types of fertilisation:- External fertilisation and Internal fertilisation.

⚫External fertilization takes place outside the body of female and internal fertilization takes place inside the body of female.

⚫During fertilization, the head of the sperm fertilize with ovum with its head first.

⚫Only one sperm reacts with ovum among millions of other sperms.

⚫The next stage of zygote is embryo.

⚫After being embryo, the body parts start developing and an organism is formed.