FlyBase curator comment: TI{FRT} represents a DNA segment which has been inserted into the genome via any technique (such as CRISPR/Cas9 or other targeted mutagenesis) that results in the inserted DNA not being flanked by transposable element ends and which contains an FRT site that is intended to be used to generate clones via mitotic recombination. Other sequences may be present in the inserted DNA and the precise sequence inserted may differ for different insertions of the construct. For details of what is inserted into the genome for an individual insertion of TI{FRT}, see the description in the insertion report and in any allele reports associated with that insertion.