1. | 3 | 2. | 5 |
3. | 8 | 4. | 12 |
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The second polar body is formed as a result of:
1. Reductional division in primary oocyte
2. Reductional division in secondary oocyte
3. Equational division in secondary oocyte
4. Equational division in primary oocyte
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I. | A prevents polyspermy. |
II. | B is the space where the polar body is released. |
III. | Cells in this region secrete progesterone. |
1. | Only I | 2. | Only I and II |
3. | Only II and III | 4. | I, II, and III |
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Consider the following two statements:
I: | Not all copulations lead to fertilization and pregnancy |
II: | Fertilization can occur if the ovum and the sperms are simultaneously transported to the fallopian tubes. |
1. Both I and II are correct and II correctly explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. I is incorrect but II is correct.
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What ensures that only one sperm can fertilize the ovum?
1. | Corona Radiata | 2. | Ground substance around ovum |
3. | Zona pellucida | 4. | Acrosome |
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What happens when a sperm enters the cytoplasm of the secondary oocyte?
1. Release of first polar body
2. Completion of meiosis II
3. Degeneration of polar bodies
4. Dissolution of zona pellucida
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In humans, the sex of the baby is determined:
1. | At the time of fertilization and by the father |
2. | At the time of fertilization and by the mother |
3. | At the time of implantation and by the father |
4. | At the time of implantation and by the mother |
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