Question

A giant rat is formed in the laboratory, what is the reason?

• A. Gene mutation
• B. Gene synthesis
• C. Gene manipulation
• D. Gene replication

Answer 1

Answer: (C)

Gene manipulation

Gene mutation is structural changes brought about by changes in one or more nucleotides; it is carried out by substitution or frameshift mutation. Gene synthesis processes to synthesize gene; the gene, for which nucleotide sequence is known, can be synthesized chemically and the genes for which sequencing has not been done, are synthesized by RNA dependent DNA polymerase. Gene replication refers to the production of new copies of genes using the existing one; it is carried out by DNA polymerase during DNA replication. The gene for growth hormone is injected into fertilized eggs or embryos which are then used for the production of transgenic mice which is giant due to overproduction of growth hormone; this is called gene manipulation

So, the correct answer is 'Gene manipulation'