In Drosophila, the gene responsible for wing shape is the "vg" gene. The "vg+" allele represents the normal wing shape, while the "vg" allele is associated with vestigial (abnormal) wings. Therefore, the genotype for normal wings in Drosophila is "vg+", where the "+" indicates the dominant normal wing allele.
- "vg" refers to the recessive allele for vestigial wings.
- "vg no" and "vg ni" are not commonly associated genotypes in this context.
Thus, the correct answer is option (A), "vg+".