How Do You Make A Human Eye Color Pedigree?
Eye color results from the actions of genes that deposit pigment in the iris (the colored disk in your eye). Eyes with no pigment look blue. (There is actually no blue coloring so the effect is a reflection, just as the sky looks blue.) Deposits of yellow or black pigment combined with the blue reflection look green or gray. Heavy pigment deposits cover the blue completely and produce brown or black eyes. The basic action involved is with genes that have pigment or genes that don’t. Pigment genes are dominant; no-pigment genes (“blue” eyes) are recessive. To learn which genes you have, construct an eye-color pedigree chart. Gather information. Learn the eye colors of as many family members as possible from at least three generations. Tip: Reduce the information to “dominant” or “recessive”: pigmented eyes or blue eyes. For example: Grandma: pigmented; Grandpa: pigmented. Mom: pigmented; Dad: blue. Sister: pigmented; Brother: blue. Represent males on your chart by squares and females by
