Question

Two parents with brown eyes have given birth to a baby with blue eyes. Explain the aspect of human genetics that make this possible.

Answer 1

when both parents have brown eyes, you have a 19% chance of getting blue eyes. (referenced in the picture below).

it is kinda a confusing concept, but this means that the parents either have 2 blue genes and 2 brown genes in the eye, and when there is 2 recessive genes in the eye it will cover the dominant gene.

dominant genes are the capital letter, and recessive genes are the lowercase (ex. Gb)