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  • Use of certain chemicals and radiation to change the base sequences of genes of crop plants are termed: a. recombinant DNA technology b. transgenic mechanism c. mutation breeding d. gene therapy.

Use of certain chemicals and radiation to change the base sequences of genes of crop plants are termed:

a. recombinant DNA technology

b. transgenic mechanism

c. mutation breeding

d. gene therapy.

Answers (1)

Mutation breeding involves the application of chemical or radiological agents, known as mutagens, to induce alterations in the plant's deoxyribonucleic acid (DNA). This process effectively changes the nucleotide sequences, which is consistent with the description provided in the question.

Explanation for Incorrect Options:

- (a) Recombinant DNA Technology: This process involves the synthesis of novel DNA sequences by integrating genetic material from disparate organisms. It is not aligned with the question's focus, as it pertains to the generation of new genetic combinations rather than solely modifying existing genes within the same species.
- (b) Transgenic Mechanism: This concept relates to the insertion of exogenous genes into a plant genome. Although it is a method of genetic alteration, it is distinct from the question's scope, which is concerned with modifying inherent genes rather than introducing external genetic elements.
- (d) Gene Therapy: This biomedical strategy targets the treatment of diseases by manipulating genes. Its relevance lies in the human therapeutic domain and is thus not directly applicable to the context of enhancing crop plants or agricultural practices.

Hence, The answer is option (c) mutation breeding.

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