Why does my dad got brown eyes and i got green

answer:

your dad has either 1 brown allele with a green or a blue and your mom has either a green or a blue allele and one green allele from one of them and a blue or green from the other parent gave you green eyes.

explanation:

so, brown eyes are dominant over green eyes. green eves are dominant over blue eyes. to get his brown eyes, your dad has at least one brown eye gene and because you have different color eyes, either one blue or one green. your mother (no details given) no matter her color eyes, has either 1 green or 1 blue allele and between your parents, 1 or 2 greens was passed to you from each parent. if your dad had passed down the green, and your mom had passed a blue, you'd have green (or vice versa). if both passed a green, you'd still have green. if either passed a brown allele, no matter what other allele you have, you'd get brown eyes. but, because you have green eyes, one of them had to have passed down a green eye allele, and the other had to have passed down a either blue eye allele or a green eye allele.