In a cross between two fruit flies, AB$/$ab $($where A $=$ long wings, a $=$ vestigial wings, B $=$ black body, b $=$ brown body$)$ and ab$/$ab$,$ the following offspring genotypes were observed:

$100$ AB $($long wings, black body$)$

$80$ ab $($vestigial wings, brown body$)$

$10$ Ab $($long wings, brown body$)$

$10$ aB $($vestigial wings, black body$)$

Given that the genes for wing size $($A$/$a$)$ and body color $($B$/$b$)$ are located on the same chromosome, calculate the map distance between the two genes.