Maternal Grandmother
Maternal Grandfather
Paternal Grandmother
Paternal Grandfather
Mother
Father
Eye Color Probability
Blue Eyes vs. Brown Eyes
Brown eyes are more common because brown is a dominant gene, while blue is recessive. However, two brown-eyed parents can still have a blue-eyed child if both carry the recessive gene.
How Genes Are Passed Down
Each person inherits two copies of every gene—one from each parent.
- Homozygous: Both copies are the same (e.g., two brown-eye genes).
- Heterozygous: The copies are different (e.g., one brown and one blue).
Gene Dominance
Dominant genes have a stronger effect.
- Brown and green are dominant.
- Blue is recessive.
A brown-eyed parent may carry both dominant brown and recessive blue genes, which can influence the baby’s eye color.
Can Blue-Eyed Parents Have a Brown-Eyed Baby?
Although rare, two blue-eyed parents can have a brown-eyed baby. Eye color is influenced by multiple genes, making such cases possible despite blue being a recessive gene.
Key Takeaways
Genetic variations can sometimes lead to unexpected results, like blue-eyed parents having a brown-eyed child.
Brown is dominant, while blue is recessive.
Eye color depends on gene combinations from both parents.
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