A man whose father was color blind marries a woman who had a color blind mother and a normal father.What % of male children to this couple will be color blind?

1. 50%
2. 75%
3. 25%
4. 0%

man father was colour blind but mother was normalso man was normal. &woman father was normal &mother was colour blind so waman was is carrier . so 1 male children means 25 percent colour blind