NEET 2019
- Exam
- NEET
- Year
- 2019
- Subject
- Zoology
- Chapter
- Human Reproduction
NEET 2019 · Zoology · Human Reproduction
Extrusion of second polar body from egg nucleus occurs
Extrusion of second polar body from egg nucleus occurs
Options
- Aafter entry of sperm but before fertilization.
- Bafter fertilization.
- Cbefore entry of sperm into ovum.
- Dsimultaneously with first cleavage.
Correct answer
A. after entry of sperm but before fertilization.
Step-by-step solution
The sperm entry stimulates the secondary oocyte to undergo a meiotic II division, which produces the ovum and the second polar body. This event occurs before fertilization.