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Question #45325
The Question
Apomixis in certain species of Asteraceae and grasses involves a developmental bypass where a diploid egg cell forms an embryo without fertilization. In a specific apomictic phenomenon known as pseudogamy, pollination is still required because the central cell must be fertilized by a male gamete to initiate endosperm formation. Which of the following statements is INCORRECT regarding this reproductive strategy?
Options
- A.
It represents a decoupling of syngamy and triple fusion, which are normally strictly synchronized during double fertilization.
- B.
The resulting seed contains an embryo that is an exact genetic clone of the maternal parent.
- C.
The endosperm formed in these seeds lacks any paternal genetic contribution, ensuring complete maternal dominance.
- D.
This mechanism is considered a form of asexual reproduction that successfully mimics sexual reproduction.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Comparative_Analysis
Sharpen your ability to evaluate multiple scenarios and distinguish between competing potential answers.
Concepts Behind This Question
Primary Endosperm Nucleus|Synergids|Embryo Sac
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students often assume that if a seed is apomictic (producing a clonal embryo), all components of the seed, including the endosperm, must be exclusively maternal.
The trap lies in failing to distinguish between the autonomous development of the embryo (syngamy bypass) and the fertilization-dependent development of the endosperm (triple fusion) in pseudogamous species.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Sexual Reproduction in Flowering Plants - Class 12 |
| Concept | Endosperm Development Sequencing |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |