Question

The process of combining cytoplasmic genomes of one parent with nuclear genome of other parent is called -

• A. Somatic hybridization
• B. Micropropagation
• C. Cybridization
• D. Regeneration

Hint:

Break down the terms: {Somatic Hybrid} = somatic cells fused completely. {Cybrid} = {Cy}toplasmic Hy{brid}, indicating a hybrid cytoplasm with one parent's nucleus.

Answer 1

The Correct Option is C

Step 1: Concept Overview:
The scenario involves a genetic modification technique yielding a cell with the nucleus from one source and the cytoplasm (containing mitochondria and chloroplasts) from a different source.
Step 2: Detailed Explanations:
Somatic hybridization: The fusion of complete protoplasts (plant cells without cell walls) from two distinct species, producing a heterokaryon containing the nuclear and cytoplasmic material of both parents.
Micropropagation: An in vitro method for rapid plant cloning, generating numerous genetically identical copies. It does not involve combining genetic material from different sources.
Cybridization: Short for "cytoplasmic hybridization," this is a variation of somatic hybridization where protoplasts fuse, but the nucleus of one parent is removed before or after fusion. The resulting cybrid contains the nucleus of one parent and the cytoplasm of the other (or a mix of cytoplasms). This aligns directly with the given description.
Regeneration: The broad process of developing an entire plant from cultured cells or tissues.
Step 3: Conclusion:
The process of generating a cell with the nucleus from one parent and the cytoplasm from another is termed cybridization.