In Drosophila, the ruby eye phenotype is caused by a recessive, X-linked mutant allele. The wild-type eye color is red. A laboratory population of Drosophila is started with 25 percent ruby-eyed females, 25 percent homozygous red-eyed females, 5 percent ruby-eyed males, and 45 percent red-eyed males. 

(a) If this population mates randomly for one generation, what is the expected frequency of ruby-eyed males and females? 

(b) What is the frequency of the recessive allele in each of the sexes?