Merfolk have three pairs of autosomes and one sex chromosome; males are X0 and females are XX. In merfolk the genes controlling tail fin shape and scale colour are on different autosomes. Solid tail fin (Ff) is dominant to forked tail fin (ff), and the F allele is recessive lethal. There are two alleles of the scale colour gene - CB(blue) and CR (red)- cB and CR show incomplete dominance with heterozygotes being purple. The silent trait is X-linked and dominant (XS) to normal voice (X+). Atolla is a male merfolk, he has a forked tail fin, blue scales, and is voiceless (silent). Brachy is a female merfolk with a solid tail fin, purple scales and a normal voice. What is the probability that a female child of a mating between Brachy and Atolla will be silent (it doesn't matter what tail shape or scale colour the child has)? Select one: . 1/4 b. 1 . 1/2 d. 3/4 o e. 0