Assertion (A) : One of the major limitations of genetic engineering is the difficulty in transferring polygenic traits in plants.
Reason (R) : Cybridization generates novel combinations of nuclear and/or cytoplasmic genomes, which is not possible through sexual hybridization.
In the light of the above statements, choose the most appropriate answer from the options given below :
Assertion (A) Correctness: Polygenic Trait Transfer Difficulty
Assertion (A) states that transferring polygenic traits in plants is a major limitation of genetic engineering. This statement is correct. Polygenic traits are influenced by multiple genes, and the precise manipulation, transfer, and integration of numerous genes, along with their complex interactions, pose significant challenges for genetic engineering technologies compared to single-gene traits.
Reason (R) Correctness: Cybridization Capabilities
Reason (R) asserts that cybridization generates novel combinations of nuclear and/or cytoplasmic genomes, which is not possible through sexual hybridization. This statement is also correct. Cybridization involves fusing cells or protoplasts to combine the nucleus of one species with the cytoplasm (containing mitochondria and chloroplasts) of another. This process allows for the creation of unique cytoplasmic genome combinations, offering possibilities beyond those of traditional sexual hybridization, which primarily involves the recombination of nuclear genes.
Relationship Between Assertion (A) and Reason (R)
Assertion (A) addresses the inherent difficulties in genetic engineering when dealing with complex polygenic traits. Reason (R) describes the specific capabilities of cybridization as a biotechnological tool for creating new genetic combinations, particularly in the cytoplasm.
While both statements are factually accurate, the mechanism and outcome described in Reason (R) (creating novel genome combinations via cybridization) do not explain or resolve the limitations mentioned in Assertion (A) (difficulty in transferring polygenic traits using genetic engineering). They pertain to different aspects of plant genetics and breeding.
Conclusion
Both Assertion (A) and Reason (R) are correct statements. However, Reason (R) does not serve as the correct explanation for Assertion (A).
Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
