In Fruit Flies, an X-Linked Dominant Mutant Allele of the Notch

Multiple Choice

In fruit flies, an X-linked dominant mutant allele of the Notch gene (N) causes Notched wings in heterozygous females but is lethal in hemizygous or homozygous condition.What ratio of offspring would be observed in a cross of a Notched-wing female with a normal male?

A) 1/3 Notched-wing females, 1/3 normal females, 1/3 normal males
B) 1/4 Notched-wing females, 1/4 normal females, 1/4 Notched-wing males, 1/4 normal males
C) 1/2 Notched-wing females, 1/2 normal males
D) 1/2 normal females, 1/2 Notched-wing males
E) 2/3 Notched-wing females, 1/3 normal males