Question

A couple have the following genotypes (for the ABO, Rh-factor and Colour vision (X^CB:normal vision, X^cb: colourblind)):

            Male:               i^Ai Rh⁺/Rh^- X^cbY

            Female:           i^Bi Rh^-/Rh^- X^CBX^cb

A. What proportion of their offspring would be AB⁺ and colourblind?

B. Male, O^- and colourblind?

C. If they have 3 children, what are the chances that NONE of the children are colourblind?

Answer 1

A). 1:4 will be AB+ and 2:4 will be colourblind

B) 1:4

C)Answer Are in following diagram

A colour blind man and a non-colour blind woman

Table 2
A non colour blind man and a colour blind carrier woman

Table 3
A colour blind man and a colour blind carrier woman

Table 4
A non colour blind man and a colour blind woman