DROSOPHILA MAP UNITS?

There is a locus on the X chromosome of Drosophila called MINIATURE WINGS with the symbol M for the wild type allele and m for the miniature allele. That locus is 28 map units from the YELLOW BODY locus with the alleles YE & ye. If a YE M/ye m female undergoes meiosis, what proportion of her gametes will have the YE m genotype?