Doctors have been following the Gallagher family for several generations in an attempt to figure out the genes involved in their colour blindness. Ian, the youngest child, views the world in reds, greens, and shades of grey. Fiona, the eldest daughter, has slightly below normal visual acuity and views the world in in yellows, blues, and shades of grey. Which of the following colour blindness disorders are Ian and Fiona most likely to have?
A)
Ian has tritanopia, while Fiona has deuteranopia or protanopia.
B)
Ian has protanopia, while Fiona has deuteranopia.
C)
Ian has deuteranopia, while Fiona has tritanopia.
D)
Ian has dueteranopia or protanopia, while Fiona has tritanopia.
Answer: A