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Question #47485
The Question
Deuteromycetes are known as 'imperfect fungi' because their sexual cycle is either absent or undiscovered. However, they can still generate genetic variation to survive environmental pressures like fungicides. If a chemical specifically inhibits the process of somatic (mitotic) crossing-over in a population of Alternaria, which of the following would be the most direct consequence?
Options
- A.
The population will fail to undergo the parasexual cycle, leading to a drastic reduction in genetic recombination and adaptive potential.
- B.
The fungus will immediately transition into the Ascomycetes class by initiating true meiosis to generate variation.
- C.
Genetic variation will be maintained through the independent assortment of chromosomes during conidia formation.
- D.
The dikaryophase will be prolonged, allowing for increased genetic exchange before karyogamy.
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Correct Answer
Step-by-Step Solution
Explanation
How the Examiner Thinks
Regulatory_Failure
Understand how NOT, EXCEPT, and logical constraints are used to manipulate exam results.
Concepts Behind This Question
Basidiomycetes_Reproductive_Structure|Calcium_Dynamics|Secondary_Messenger_Cascade
Why This Question Is Tricky
Common Mistakes
Conceptual Pivot: Students memorize that Deuteromycetes lack sexual reproduction but often fail to understand how they survive evolutionary pressures.
The question tests the NCERT-Plus concept of the 'parasexual cycle' (mitotic recombination) as the compensatory mechanism for genetic variance in Fungi Imperfecti.
The trap lies in confusing mitotic spore formation (conidia) with meiotic processes (independent assortment).
Quick Facts About This Question
Question Information
| Subject | Biology |
| Chapter | Biological Classification - Class 11 |
| Concept | Basidiomycetes Reproductive Structure |
| Difficulty | 8 |
| Cognitive Load | 5 |
| Target Solve Time | 120 sec |
| Access | Free |