Agnes and Bo are married to each other. Bo has defective color vision $($red$-$green color blindness$)$ and Agnes' father has the same defective color vision as Bo$.$ However, Agnes mot and Bo's parents have normal color vision. Investigate the possibilities for how Agnes and Bo's children will be affected by red$-$green color blindness, become grant holders for red$-$green color blindness or have completely normal color vision. Color blindness is inherited in a sex$-$linked $($X$-$chromosome$)$ recessive manner.