Eye Color Genetics

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Author: Melissa Bautista

As the saying goes, “the eyes are the windows to the soul”. Our eyes are also a window into our genes. Like many of our physical features, eye color is determined by genetics.

Although there are only a few eye colors, there are many gene combinations. Examining eye color genetics can be a great way to understand genetics as a whole. In this experiment we will study eye color genetics by predicting eye color inheritance among family members.


How do we inherit our eye color?


  • Families
    • Biological Mother
    • Biological Father
    • Offspring 


For this experiment you can also use your own family.

  1. Observe eye color for each family member. If possible, find out the grandparents’ eye colors as well. You can define the color using the Martin-Schultz scale.
  1. Determine the genotypes of the parents.
  2. Using a Punnett square, determine the color possibilities for the children.
  1. Compare the theoretical probability and actual eye color of the children.
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