Determine the child's eye color

Online calculator to predict the likely eye color of a child based on the genetic information of the parents.

Determining a child's eye color is based on the genetic principles of inheritance. Each person inherits genes from their parents, and eye color is determined by the combination of these genes.

Human eye color is determined by two main types of pigment in the iris: Brazilian pigment (melanin), which is responsible for brown, green, and blue shades, and blue pigment (collagen), which gives the eyes blue and gray color.

Main principles of determining a child's eye color:

1. Genetic information from parents: Each parent passes one eye color gene to the child. Genes for Brazilian pigment (B) and blue pigment (b) are the main genes responsible for eye color.

2. Dominance and recessiveness: The gene for Brazilian pigment (B) is dominant, while the gene for blue pigment (b) is recessive. This means that if the child has at least one gene for Brazilian pigment (for example, BB or Bb), they are more likely to have brown eyes. For the child to have blue eyes, they need to inherit two recessive genes (bb).

3. Gene mixing: In cases where parents have different eye color genes (for example, one parent has BB, and the other bb), the child may inherit one gene for Brazilian pigment and one gene for blue pigment (Bb), which can lead to green or blue eye color.

4. However, it should be noted that eye color inheritance is a complex process, and other genes and factors can influence the final result. Therefore, the exact eye color of the child cannot always be predicted with complete certainty, and it may differ from the eye color of the parents.