Explain the events taking place at the time of fertilization of an ovum in a human female
Dear student
Please refer the solution below for the said query
Hope this information clears your doubt about the topic.
Regards
Please refer the solution below for the said query
- During coitus, the semen is released into the vagina, passes through the cervix of the uterus and reaches the ampullary-isthmic junction of the fallopian tube.
- The ovum is also released into the junction for fertilisation to occur.
- The process of fusion of the sperm and the ovum is known as fertilisation.
- During fertilisation, the sperm induces changes in the zona pellucida and blocks the entry of other sperms. This ensures that only one sperm fertilises an ovum.
- The enzymatic secretions of the acrosomes help the sperm enter the cytoplasm of the ovum.
- This causes the completion of meiotic division of the secondary oocyte, resulting in the formation of a haploid ovum (ootid) and a secondary polar body.
- Then, the haploid sperm nucleus fuses with the haploid nucleus of the ovum to form a diploid zygote.
Hope this information clears your doubt about the topic.
Regards