Mainly sons born from mothers to color blind parent(s) would be a trend.
Color blindness usually affects men more than women because the affected X chromosome from their mom is not compensated for with the Y chromosome given to them by their dad. Girls are usually unaffected because the 2 X chromosomes they have overpower the defective gene.
List three ways of reducing friction. 1.Polishing the rough surface. 2.Providing all bearings or wheels between the moving parts of a machine or vehicles reduce friction and 3.allow smooth movement as rolling friction is less than sliding friction.