It stains dark with R banding. It replicates early in S phase. G dark and Q bright. I D. mitotic anaphase and meiotic anaphase II 16. 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.