Context: This passage describes the wing type trait in fruit flies:
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 for vestigial wings (n) is recessive to the allele for normal wings (N).
This Punnett square shows a cross between two fruit flies.
What is the probability that a fruit fly produced by this cross will have normal wings?
A. 1/4
B. 3/4
C. 2/4
D. 0/4
E. 4/4
From the given choices, pick the correct answer and respond by indicating the letter of the correct option.
Answer: E