In Drosophila, vermilion eye color is due to a recessive allele (v) located on the X chromosome. Curved wings
are due to a recessive allele (cu) located on one auto some, and ebony body is due to a recessive allele (e) located on another auto some. A vermilion male is mated to a curved, ebony female, and the F₁ males are phenotypically wildtype. If these males were back crossed to curved, ebony females, what proportion of the F₂ offspring will be wildtype males?