The last Emperor of Russia, Nicolas II, was married to Empress Alexandra, and they had five children, Olga, Tatiana, Maria, Anastasia, and Alexis. Alexis was the only one who was afflicted with...

The last Emperor of Russia, Nicolas II, was married to Empress Alexandra, and they had five
children, Olga, Tatiana, Maria, Anastasia, and Alexis. Alexis was the only one who was afflicted
with hemophilia or the royal bleeding disease; all other members were normal.
 Research on this medical condition and determine the mode of inheritance.
 If only Prince Alexis was afflicted with the disease, determine his genotype.
 What could be the genotypes of the Emperor and Empress?
 Is it possible that each daughter could have been a carrier?