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The second maturation division of the mammalian ovum occurs
[2010]
- a)shortly after ovulation before the ovum makes entry into the fallopian tube
- b)until after the ovum has been penetrated by a sperm
- c)until the nucleus of the sperm has fused with that of the ovum
- d)in the graafian follicle following the first maturation division
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
The second maturation division of the mammalian ovum occurs[2010]a)sho...
In Oogenesis, the second maturation division occurs until after the ovum has been penetrated by a sperm. Oogenesis involves the formation of haploid female gametes, ova, from this diploid egg mother cells, oogonia of ovary of female organism.
Most Upvoted Answer
The second maturation division of the mammalian ovum occurs[2010]a)sho...
The second maturation division of the mammalian ovum occurs after the ovum has been penetrated by a sperm. This is the process of fertilization. Let us understand this in detail.
Fertilization
Fertilization is the process by which a sperm joins an ovum to form a zygote. This process occurs in the fallopian tube after ovulation. The ovum is surrounded by a layer of cells called the corona radiata and a protective layer called the zona pellucida. The sperm needs to penetrate these layers to reach the ovum.
Penetration of Sperm
The sperm reaches the ovum by swimming through the female reproductive tract. Once it reaches the ovum, it binds to the zona pellucida and releases enzymes that digest the zona pellucida, allowing the sperm to penetrate it. This triggers the release of cortical granules from the ovum that harden the zona pellucida, preventing the entry of more sperm.
Fusion of Nuclei
Once the sperm has penetrated the ovum, the two haploid nuclei, one from the sperm and one from the ovum, fuse to form a diploid zygote. This is the second maturation division of the ovum.
Conclusion
Thus, the second maturation division of the mammalian ovum occurs after the ovum has been penetrated by a sperm. This is the process of fertilization where the haploid nuclei of the sperm and ovum fuse to form a diploid zygote.
Fertilization
Fertilization is the process by which a sperm joins an ovum to form a zygote. This process occurs in the fallopian tube after ovulation. The ovum is surrounded by a layer of cells called the corona radiata and a protective layer called the zona pellucida. The sperm needs to penetrate these layers to reach the ovum.
Penetration of Sperm
The sperm reaches the ovum by swimming through the female reproductive tract. Once it reaches the ovum, it binds to the zona pellucida and releases enzymes that digest the zona pellucida, allowing the sperm to penetrate it. This triggers the release of cortical granules from the ovum that harden the zona pellucida, preventing the entry of more sperm.
Fusion of Nuclei
Once the sperm has penetrated the ovum, the two haploid nuclei, one from the sperm and one from the ovum, fuse to form a diploid zygote. This is the second maturation division of the ovum.
Conclusion
Thus, the second maturation division of the mammalian ovum occurs after the ovum has been penetrated by a sperm. This is the process of fertilization where the haploid nuclei of the sperm and ovum fuse to form a diploid zygote.
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The second maturation division of the mammalian ovum occurs[2010]a)shortly after ovulation before the ovum makes entry into the fallopian tubeb)until after the ovum has been penetrated by a spermc)until the nucleus of the sperm has fused with that of the ovumd)in the graafian follicle following the first maturation divisionCorrect answer is option 'B'. Can you explain this answer?
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