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During oogenis , the small structures se...

During oogenis , the small structures separated from egg is :

A

Polar bodies

B

Secondary endosperm

C

Herring bodies

D

Hela cells

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Oogenesis**: Oogenesis is the process of egg (ovum) formation in females. It involves the development of primary oocytes into mature ova through a series of stages including meiosis. 2. **Meiosis in Oogenesis**: During oogenesis, the primary oocyte undergoes meiosis. This process consists of two meiotic divisions: meiosis I and meiosis II. 3. **Unequal Cytoplasmic Division**: In both meiotic divisions, the cytoplasm does not divide equally. The primary oocyte divides to form a secondary oocyte and a smaller cell. The smaller cell is known as the polar body. 4. **Formation of Polar Bodies**: - In meiosis I, the primary oocyte produces one secondary oocyte (which will develop into the ovum) and one polar body (first polar body). - In meiosis II, the secondary oocyte divides again, producing the ovum and a second polar body. The first polar body may also divide to produce additional polar bodies. 5. **Total Polar Bodies**: In total, three polar bodies are produced during oogenesis: one from meiosis I and two from the subsequent divisions of the polar bodies. 6. **Identifying the Correct Answer**: Among the options provided: - **Polar Bodies**: Correct answer, as they are the small structures separated from the egg during oogenesis. - **Secondary Endosperm**: Incorrect, as this is related to plant reproduction. - **Herring Bodies**: Incorrect, as these are related to the posterior pituitary gland. - **HeLa Cells**: Incorrect, as these are a human cell line used in research. 7. **Conclusion**: The correct answer to the question is **polar bodies**, which are the small structures separated from the egg during the process of oogenesis.
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ALLEN-REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH -Exercise-III(A) (Ncert Based Questions)
  1. Various changes in mammalian sperm which prepare it to fertilize the o...

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  2. In gastrula stage which layer are formed

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  3. During oogenis , the small structures separated from egg is :

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  4. Foetal sex can be determined by examining cells from the amniotic flui...

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  5. Which of the following is not correct for gastrulation ?

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  6. On human foetus, the heart begins to beat at development age of

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  7. Development of animal embryo from an unfertilized egg is called

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  8. During embryonic development , endoskeleton and muscle develop from wh...

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  9. Polar body is produced durign the formation of

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  10. Fertilization of ovum occurs in

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  11. In a vertebrate which germ layer forms the skeletal muscles ?

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  12. Liver and pancreas of frog and rabbit are derived from :

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  13. Which layer develops first durign embryonic development?

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  14. Acrosome of sperm is formed from

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  15. The nervous system of vertebrates is derived from :

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  16. Cavity formed during gastrulation is

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  17. The occurrence of mitochondria in sperm is

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  18. Identical twins are born when:

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  19. Which set of enzymes is found in the acrosome of mammalian spermatozoa...

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  20. Fixing up of blastocyst in the wall of the uterus is known as

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