Braingle Lite



Stone-washed Genes

Category:Probability
Submitted By:norcekri
Fun:*** (2.59)
Difficulty:** (2.02)



Both of my parents have brown eyes, as do I. My brother and my wife have blue eyes. Using the simple brown-blue model (two genes; a brown gene dominates blue gene), what are the chances of my first child having blue eyes?

Hint:

Given my brother's blue eyes, what are the odds on my pair of eye-color genes?

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