How can eye color be inherited?

eye color isn't only inherited from your parents eye color. they could have recessive blue eye genes and have dominant brown eye alleles, therefore there is a chance you get blue eyes though both of your parents have brown. there is a fairly low chance, but it is still possible. let's say your mom has blue eyes and your dad has brown eyes, there is more of a chance that you get brown eyes, whereas if your dad also had blue eyes, you would have a 50% chance to get blue eyes since blue eyes are recessive. hopefully this helped ♡

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.