Some scientists breed fruit flies to learn how traits are inherited. These scientists often use flies with vestigial wings, which are shorter and stubbier than normal wings. Fruit flies with vestigial wings cannot fly, so they are easier for scientists to handle and study. In a group of fruit flies, some individuals have normal wings and others have vestigial wings. In this group, the gene for the wing type trait has two alleles. The allele N is for normal wings, and the allele n is for vestigial wings.
A certain fruit fly from this group has vestigial wings. This fly has two alleles for vestigial wings.
Based on this information, what is this fruit fly's genotype for the wing type gene?