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Q. No.Polyembryony in mango is due to:
| 1. | The formation of multiple zygotes |
| 2. | The development of additional embryos from the integument |
| 3. | The development of embryos from somatic cells of the ovule |
| 4. | Fertilization of multiple ovules within the same ovary |
Subtopic: Apomixis & Polyembryony |
From NCERT
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Consider the given two statements:
| Assertion (A): | Active research is going on in many laboratories around the world to understand the genetics of apomixis and to transfer apomictic genes into hybrid varieties. |
| Reason (R): | Hybrid crop varieties do not reproduce sexually. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Apomixis & Polyembryony |
56%
From NCERT
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Which of the following statements is true about polyembryony?
| 1. | It refers to the presence of multiple cotyledons in the embryo. |
| 2. | It is the formation of multiple embryos from a single fertilized egg. |
| 3. | It occurs only in albuminous seeds, such as wheat and rice. |
| 4. | It results from the division of nucellar or integumentary cells to form additional embryos. |
Subtopic: Apomixis & Polyembryony |
55%
From NCERT
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Consider the given two statements:
| Assertion (A): | Polyembryony is the occurrence of more than one embryo in a seed. |
| Reason (R): | In certain species like Citrus and Mango, the female gametophytes has multiple egg cells. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Apomixis & Polyembryony |
53%
From NCERT
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Consider the given two statements:
| Assertion (A): | Parthenocarpy is desirable in fruit crops such as banana and orange. |
| Reason (R): | Parthenocarpy leads to development of seeds without fertilization. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Apomixis & Polyembryony |
57%
From NCERT
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