ANSWERS: 3
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50/50
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Probably 1/4 the odds since blue eyes is a recessive trait. This is basic genetics that I learned in high school.
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Probably somewhere between 1/2 and 1/4 - but it would help to know his grandparent's eye colors too, and his sibling's colors, if he has any. Brown is a dominant trait - and things like hazel and green are possible recessives too. He could easily carry a blue recessive, or essentially any other recessive too, from his parents.
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