In a cross of Drosophila melanogaster, you mate a parental line that displays crossed eyes (an autosomal recessive trait) and corkscrew bristles (an autosomal recessive trait) to a wild-type fly.
The loci of the two genes are known to be unlinked.
The F1 flies all appear to be wild type.
You mate the F1 flies with each other in the hope of recovering the cross-eyed corkscrew phenotype!
To have 95% confidence of finding at least one cross-eyed corkscrew fly, how many individual F2 flies should you plan to analyze?