Question

During protoplast fusion, the product has the nucleus of one of the parents in which the chromosome elimination took place in subsequent cell division and the cytoplasm was contributed by both the parents. Such a product will be called:

• A. Symmetric hybrid
• B. Asymmetric hybrid
• C. Cybrid
• D. Homokaryons

Hint:

Symmetric = All chromosomes from both; Asymmetric = Partial loss of one set.

Answer 1

The Correct Option is B

Step 1: Concept
Somatic hybridization produces different types of cells depending on how the nuclei and cytoplasm combine and persist.

Step 2: Meaning
A "Cybrid" is a cytoplasmic hybrid where one nucleus is completely absent.

Step 3: Analysis
In this case, the product starts with nuclear material from one parent that then undergoes chromosome elimination (partial loss). This resulting imbalance in nuclear contribution, paired with mixed cytoplasm, defines an asymmetric hybrid.

Step 4: Conclusion
The term for a hybrid with unbalanced or eliminated chromosomal sets from one parent is an asymmetric hybrid. Final Answer: (B)