. A woman with normal vision, but whose father was colourblind, marries a colourblind man. AIPMT - 2004 Suppose that the fourth child of this couple was a boy. This boy

• A. May be colourblind or may be of normal vision
• B. Must be colourblind
• C. Must have normal colour vision
• D. Will be partially colourblind since he is heterozygous for the colourblind mutant allele.
• E. cessive