Consider a diploid fish in which tail length is solely controlled by the additive action of two unlinked loci, F $($f$)$ and G $($g$),$ without any effect of the environment. A female of genotype F$/$F ; G$/$G$,$ with a $3-$cm$-$long tail, is crossed to a male of genotype f$/$f ; g$/$g$,$ with a $2-$cm$-$long tail. All the F$1$ fish have $2\mathrm{.}5-$cm$-$long tails.What will be the most frequent tail length among the F$2$ individuals?Group of answer choices$3$ cm$2\mathrm{.}5$ cm$2$ cm$2\mathrm{.}25$ cm$2\mathrm{.}75$ cm