TLS Online TPP Program
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TLS Online TPP Program
#Question id: 39257
#Plant Biotechnology
Q. Assertion (A): The main purpose of producing asymmetric hybrids is the introgression of specific desirable genes into another species.
Reason (R): Asymmetric hybridization allows selective elimination of chromosomes from one parent while retaining specific genes.
TLS Online TPP Program
#Question id: 39258
#Plant Biotechnology
Q. Assertion (A): Asymmetric hybrids often contain multiple genome copies of the non-irradiated parent.
Reason (R): Irradiation of one parent leads to extensive chromosome breakage and deletion.
TLS Online TPP Program
#Question id: 39259
#Plant Biotechnology
Q. Assertion (A): After repeated backcrossing of asymmetric hybrids with N. plumbaginifolia, plants with a diploid N. plumbaginifolia genome and a few A. belladonna chromosomes were recovered.
Reason (R): Backcrossing helps eliminate unwanted alien chromosomes while retaining selected genes.
TLS Online TPP Program
#Question id: 39260
#Plant Biotechnology
Q. Assertion (A): All asymmetric hybrids contained nitrate reductase gene and rDNA repeats of Atropa belladonna.
Reason (R): rDNA repeats are often preferentially retained during asymmetric hybridization.
TLS Online TPP Program
#Question id: 39261
#Plant Biotechnology
Q.Assertion (A): Hybrids obtained from irradiated carrot and non-irradiated rice protoplast fusion resembled rice plants.
Reason (R): The non-irradiated parent usually contributes more intact genomic material.
TLS Online TPP Program
#Question id: 39262
#Plant Biotechnology
Q. Assertion: The fusion of B. napus (AACC) and B. nigra (BB) results in a hybrid with the genomic constitution AABBCC.
Reason: This specific interspecific fusion was primarily conducted to transfer resistance against Phoma lingam (black-leg disease) to rapeseed.