A property professional with nearly 20 years experience of estate agency in Suffolk and North Essex. During that time I have carried out market appraisals on over 5000 residential properties and have helped over 1500 people successfully sell their home.
Therefore, a son from a color-blind mother (who receives the trait from his mother on the X-chromosome) will always be color-blind, regardless of the state of the father (who can only give his son a Y-chromosome).
Newborns can't see clearly at birth. In fact, vision is about 20/400, making the first days of sight very blurry, like a camera out of focus. But within a week, a baby can focus on objects about 8 to 12 inches from his face.