A cross is made between a female Drosophila heterozygous for the recessive alleles cn (cinnabar eye) and y
(yellow body), also recessive, and a cinnabar male with normal body color. Among the female progeny the
phenotypes were one-half wild type and one-half cinnabar. Among the male progeny the phenotypes were
one-fourth yellow body, one-fourth cinnabar, one-fourth wild type, and one-fourth cinnabar and yellow
body. From these data, it can be determined that most likely
y is on the Y chromosome and cn is autosomal.
both cn and y are autosomal.
cn is sex-linked and y is autosomal.
y is sex-linked and cn is autosomal.
