Some Organisms

Some organisms,

A) The sex-determining locus is on the W chromosome
B) Phenotypes resulting from Z-linked genes show up more frequently in males than in females
C) The Z chromosome in birds and the X chromosome in humans are genetically similar
D) The ZW/ZZ and XY/XX systems provide evidence of independent evolution of sex determination.
E) g., birds, have a ZW/ZZ system of sex determination rather than the XY/XX system that is familiar from mammals. Which of the following characteristics are true of the ZW/ZZ system? Please select all that apply.