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Question #47556
The Question
Apomixis in angiosperms represents a developmental bypass that mimics sexual reproduction. Regarding the specific phenomenon of nucellar polyembryony observed in Citrus and Mangifera, which of the following statements is INCORRECT?
Options
- A.
The resulting embryos are genetically identical to the maternal parent, rendering Mendelian segregation null.
- B.
The embryos develop directly from a diploid egg cell that was formed without meiotic reduction division.
- C.
A single seed will contain multiple embryos, potentially at different stages of development.
- D.
This mechanism allows for the indefinite preservation of hybrid vigour in progeny without relying on vegetative propagation.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Evolutionary_Exception
Tackle problems where standard rules evolve or change based on specific environmental constraints.
Concepts Behind This Question
Selaginella|Salvinia|Megaspores|Microspores
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students frequently conflate the different mechanisms of apomixis.
While both bypass syngamy, nucellar polyembryony (adventive embryony) involves sporophytic maternal tissue (nucellus) directly forming the embryo, whereas the 'unreduced diploid egg' mechanism involves a gametophytic bypass.
The trap relies on misattributing the mechanism of one apomictic pathway to another.
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Plant Kingdom - Class 11 |
| Concept | Sexual Reproduction Variations |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |