Loss-of-function mutations in which of the following genes typifies colorectal carcinomas?

a. myc              b. K-ras                       c. p53              d. APC

TLS Online TPP Program

#Question id: 39264

#Plant Biotechnology

Q. Assertion: Tobacco hybrids produced from N. rustica and N. tabacum may exhibit resistance to blue mould. 

Reason: Blue mould resistance was a primary trait present in both parent lines and was intentionally selected for during the initial fusion process.

TLS Online TPP Program

#Question id: 39265

#Plant Biotechnology

Q. Assertion: Symmetric hybrids are utilized to widen the genetic base of allopolyploid species.

 Reason: Producing synthetic lines of Brassica napus by fusing B. oleracea and B. campestris introduces desirable traits that might be missing in the current cultivated pool.

TLS Online TPP Program

#Question id: 39266

#Plant Biotechnology

Q. Assertion: Somatic hybrids of potato fused with S. brevidens are used in breeding programs to combat Potato Leaf Roll Virus (PLRV). 

Reason:S. brevidens is a wild relative of the potato that carries natural resistance to certain viral and bacterial diseases like Erwinia soft rot.

TLS Online TPP Program

#Question id: 39267

#Plant Biotechnology

Q. Superior somatic hybrids showing 20–25% higher alkaloid content and potential for industrial scopolamine production were obtained from fusion between:

TLS Online TPP Program

#Question id: 39268

#Plant Biotechnology

Q. Which somatic hybrid combination resulted in markedly higher tuber yield, with one clone producing three times the yield of commercial potato variety Bintje?

TLS Online TPP Program

#Question id: 39269

#Plant Biotechnology

Q. Somatic hybrids between Moricandia arvensis and Brassica napus are significant because they exhibit: