Q. Regarding the tomato × Solanum acaule cybrids:

Statement I: Regenerants were morphologically and cytologically similar to tomato.

Statement II: They exhibited cytoplasmic male sterility (CMS) inherited maternally.

Statement III: CMS expression disappeared after one generation.

Statement IV: Some regenerants had malformed or nonfunctional pollen.

Which statements are correct?

TLS Online TPP Program

#Question id: 39239

#Plant Biotechnology

Q. The frequency of stable variants in cell selection:

TLS Online TPP Program

#Question id: 39240

#Plant Biotechnology

Q. Loss of resistance in plant cell lines after growth in the absence of selection pressure is characteristic of:

TLS Online TPP Program

#Question id: 39241

#Plant Biotechnology

Q. Which of the following best explains resistance due to gene amplification in plant cell cultures?

TLS Online TPP Program

#Question id: 39242

#Plant Biotechnology

Q. Variants that are stable in cell culture but lose resistance after plant regeneration or sexual reproduction are known as:

TLS Online TPP Program

#Question id: 39243

#Plant Biotechnology

Q. Which category shows stable expression of resistance in cell culture, regenerated plants, and through sexual reproduction?

TLS Online TPP Program

#Question id: 39244

#Plant Biotechnology

Q. Assertion (A): Somaclonal variation does not require the use of mutagens.

Reason (R): Variations arise during in vitro culture and regeneration processes.

Choose the correct option: