1. What is magnetic declination? Why is it important to set or check the magnetic declination on a compass whenever you go out into the field to map rock formations? What can happen
if you do not make sure the declination on the compass is set correctly?

the father in the first generation probably had the recessive colorblind trait in his x chromosome. if he and his wife both had the colorblind trait, even if she had 1 recessive and 1 dominant, then that trait would be passed on to their kids.

(since you didn't attach the family tree this is just an assumption)

it will increase due to the time span

the electromagnetic energy from the sun arrives in the form of visible and invisible light.