B. It is transcriptionally active throughout all phases of the cell cycle. It is transcriptionally active in all cell types. D. It would stain G dark and Q bright if derived tissues that were transcriptionally active. E. It would stain G dark and Q bright regardless of the transcriptional status of the tissues. A male with 47, XXY is color blind.
Color blindness is an X-linked recessive trait.
His parents both have normal color vision. Excluding a spontaneous mutation, what is the most likely chromosomal event to explain both his karyotype and his colorblindness. I in the father. B. Nondisjunction at meiosis II in the father. I in the mother.