What is the most likely explanation for the wide range of phenotypes observed in XX/XO and XY/XO mosaics?

• A. Random segregation of X and Y chromosomes during meiosis
• B. Epigenetic modifications to the X and Y chromosomes
• C. Recombination events between the X and Y chromosomes
• D. Gene dosage compensation mechanisms in response to X chromosome loss

Answer: (D)