Question

If a colourblind woman marries a normal visioned man, what will be the condition of vision of their sons?

• A. Three-fourth colourblind and one-fourth normal
• B. All colourblind
• C. All normal visioned
• D. One-half colourblind and one-half normal

Answer 1

The correct option is B All colourblind

If a colourblind woman marries a normal visioned man all sons will be colourblind. Its because the X genes in mother will be transferred to sons, which carries the defective genes.