Assume that the genes for tan body and bare wings are 15 map units apart on chromosome ii in drosophila. assume also that a tan-bodied, bare-winged female was mated to a wild-type male and that the resulting f1 phenotypically wild-type females were mated to tan-bodied, bare-winged males. of 1000 offspring, what would be the expected of wild-type offspring, and in what numbers would they be expected