NEETZoologyHuman Reproduction
When does fertilisation occur?
Options
- AWhen the ovum is released by the ovary
- BWhen a sperm enters into the cytoplasm of the ovum
- CWhen the ovum and sperms are transported simultaneously to the ampullary region
- DWhen the secretions of the acrosome help the sperm enter into the cytoplasm of the ovum
Correct answer
C. When the ovum and sperms are transported simultaneously to the ampullary region
Step-by-step solution
During copulation (coitus) semen is released by the penis into the vagina (insemination). The motile sperms swim rapidly, pass through the cervix, enter into the uterus and finally reach the ampullary region of the fallopian tube (Figure 2.11b). The ovum released by the ovary is also transported to the ampullary region where fertilisation takes place