Three point test cross:

$$You cross two true$-$breeding strains of pigs that differ with regard to three alleles.

One variety has long tail $($t$+$t$+),$ long legs $($l$+$l$+)$ and long ears $($e$+$e$+).$ The other variety has short tail $($tt$),$ short legs $($ll$)$ and short ears $($ee$).$

$($t$+,$ l$+,$ e$+$alleles represent the alleles with dominant phenotype and$$t$,$ l$,$ e$$represents the alleles with recessive phenotype in each pair$)$

$$You obtain F$1$ heterozygotes $($from the above cross$)$ that you test cross with a pig that is homozygous recessive for all three alleles. Recombination occurs in the heterozygous parent during meiosis. The following progeny $($both males and females$)$ were obtained from test cross in the following numbers.

Long tail, long legs, long ears$248$

Long tail, long legs, short ears$35$

Long tail, short legs, long ears$1$

Long tail, short legs, short ears$20$

Short tail, long legs, longs ears$18$

Short tail, long legs, short ears$2$

Short tail, short legs, long ears$33$

Short tail, short legs, short ears$238$

The recombination frequency between the tail$-$size and the ear$-$size genes is approximately: