Question

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Describe the process of fertilisation in human beings.​

Answer 1

Answer:

The process of fertilization involves a sperm fusing with an ovum. ... The sperm plasma then fuses with the egg's plasma membrane, triggering the sperm head to disconnect from its flagellum as the egg travels down the Fallopian tube to reach the uterus.

Answer 2

$\bold{Answer\;:-}$

• Fertilisation is the penetration of a mature ovum by spermatozoon and fusion of male and female pronuclei. In humans, fertilisation takes place in ampullary-isthmic junction of fallopian tube.

• The secretions of the female genital tract remove coating substances deposited on the surface of the sperms particularly those on the acrosome. The capacitated sperm undergoes acrosomal reaction and releases various chemicals contained in the acrosome these chemicals are collectively called sperm lysins. Due to acrosomal reaction, plasma membrane of the sperm fuses with the plasma membrane of the secondary oocyte. Changes in the membrane of the oocyte block the entry of additional sperms. Thus, it ensures that only one sperm can fertilize an ovum. Entry of the sperm induces the completion of the meiotic division of the secondary oocyte. The second meiotic division is also unequal and results in the formation of second polar body and haploid ovum (ootid). Soon the haploid nucleus of the sperm and that of the ovum fuse together to form a diploid zygote.

$\bold{Hope\;it \; helps\;!}$