How do I offspring inherit genetic information from their parents

How do I offspring inherit genetic information from their parents?

Offspring inherits genetic information during mating of parents which leads to fertilization and formation of a zygote (offspring) and such genetic information are expressed phenotypically and are shown physically which could be in height, length of tail, skin color, among others

Explanation:

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)