Female Drosophila heterozygous for three recessive mutations e (ebony body), st (scarlet eyes), and ss (spineless bristles) were testcrossed, and the following progeny were obtained:

Phenotype                                 Number
Wild-type............................................. 67
Ebony.....................................................8
Ebony, scarlet......................................68
Ebony, spineless...............................347
Ebony, scarlet, spineless....................78
Scarlet................................................368
Scarlet, spineless................................10
Spineless.............................................54

(a) What indicates that the genes are linked?
(b) What was the genotype of the original heterozygous females?
(c) What is the order of the genes?
(d) What is the map distance between e and st?
(e) What is the map distance between e and ss?
(f) What is the coefficient of coincidence?
(g) Diagram the crosses in this experiment.