The following pedigree chart depicts the inheritance of colour-blindness. If Gita is expecting another child, what is the probability that it will be colour-blind?

Gita is a carrier (X^cX) and her husband is normal (XY). Half of her sons would be colourblind and all of her daughters would be carriers with normal vision. If she were to give birth to another child, the probability of the child to be male is 0.5 and the probability of male child to be colourblind is 0.5. So, the probability of her next child to be colourblind would be 0.5 x 0.5 = 0.25 (25%).