Question

how ovum is fertilized pla tell me fast

Answer 1

Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. The process of fertilization involves a sperm fusing with an ovum.
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Answer 2

         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.  Thanks! Cheers!