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The number of polar bodies formed during oogenesis in human being is:
- a)2
- b)3
- c)1
- d)Both 2 and 3.
Correct answer is option 'D'. Can you explain this answer?
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The number of polar bodies formed during oogenesis in human being is:a...
Polar bodies formed during oogenesis in humans
- During human oogenesis, three polar bodies are created.
- Polar bodies are tiny cytoplasmic exclusion structures that form to contain extra DNA produced during oocyte meiosis, which occurs after sperm fertilization.
- The zygote contains roughly 2-3 polar bodies, which are derived from the oocyte.
- This figure is determined by whether or not the first polar body (produced during meiosis I) splits during meiosis II.
- Excess DNA generated from reductive division makes up such an exclusion body (2nd and 3rd polar bodies are formed from meiosis II at the time of fertilization).
- Such polar bodies do not contribute to the zygote's, foetus', or embryo's future genetic complement.
Most Upvoted Answer
The number of polar bodies formed during oogenesis in human being is:a...
Oogenesis is the process of formation and development of female gametes or ovum. It involves a series of cell divisions and differentiation, leading to the formation of a mature ovum that can be fertilized by a sperm.
During oogenesis in human beings, the number of polar bodies formed is two.
Explanation:
Formation of polar bodies:
1. Primary oocyte undergoes meiosis-I and forms two daughter cells - the secondary oocyte and the first polar body.
2. The secondary oocyte then undergoes meiosis-II and forms two daughter cells - the mature ovum and the second polar body.
3. The first polar body may or may not undergo meiosis-II and form two polar bodies (depending on the species). In humans, the first polar body usually does not undergo meiosis-II and remains as a small cell that eventually disintegrates.
4. The second polar body is also a small cell that disintegrates.
Therefore, the number of polar bodies formed during oogenesis in human beings is two.
During oogenesis in human beings, the number of polar bodies formed is two.
Explanation:
Formation of polar bodies:
1. Primary oocyte undergoes meiosis-I and forms two daughter cells - the secondary oocyte and the first polar body.
2. The secondary oocyte then undergoes meiosis-II and forms two daughter cells - the mature ovum and the second polar body.
3. The first polar body may or may not undergo meiosis-II and form two polar bodies (depending on the species). In humans, the first polar body usually does not undergo meiosis-II and remains as a small cell that eventually disintegrates.
4. The second polar body is also a small cell that disintegrates.
Therefore, the number of polar bodies formed during oogenesis in human beings is two.
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The number of polar bodies formed during oogenesis in human being is:a...
Option:b ans is 3
1st polar body during meiosis 1
2nd one during meiosis 2 and when secondary oocyte mature into ovum then 3rd polar body
1st polar body during meiosis 1
2nd one during meiosis 2 and when secondary oocyte mature into ovum then 3rd polar body
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The number of polar bodies formed during oogenesis in human being is:a)2b)3c)1d)Both 2 and 3.Correct answer is option 'D'. Can you explain this answer?
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