A particular eukaryotic cell, called Cell X, has red pigment in its cell membrane. A different eukaryotic cell, called Cell Y, has yellow pigment in its cell membrane. Each cell underwent five mitotic divisions, and researchers observed the offspring for pigment color. The results showed that all of the offspring of Cell X had red pigment in their cell membrane and all of the offspring of Cell Y had yellow pigment in their cell membrane. Which of the following statements best explains this data?

Different bacterial cell lines cannot possess the same pigment color.
Genetic information is passed from one generation to another through mitosis.
Membrane pigmentation is random.
Mitosis causes mutations in membrane pigment color.