<prompt> Mutations that completely disrupt the function of the gene used in which of the following technique:Non-sense mutationRestriction fragment length polymorphismTargeted gene disruptionKnock-in  <response>: Targeted gene disruptionGene knock -out : Mutations that completely disrupt the function of the gene. Predominantly used in mice tissue specific knock-out possible crelox Absence of phenotype possible due to redundancy. Targeted Knock-in : Introduction of subtle mutations into gene by substitution of endogenous gene with gene carrying a specific mutation. Homologous recombination in embryonic stem cells Predominantly used in mice can accurately model human disease Restiction Fragment Length Polymorphism RFLP: DNA variation occurring in more than 1 of general population is known as RELP. Use : Inherited disease in which the functional deficit is unknown Nonsense mutation: Nonsense codon result in the premature termination of amino acid incorporation into a peptide chain Production of only a fragment of intended protein molecule. 