You go back to bio class! Hair color is one of the most complex physical inheritances out there. Know one ginger couple with blonde and brunette for kids.
No it isn't, ginger is recessive. If all four grandparents are brunette then that changes what their grandchildren will look like even if mom and dad are both gingers.
Cfreymarc-red hair is a recessive trait, which by definition requires recessive x recessive. Blond or brunette are dominant to red, so it would require recessive x dominant. You need to break it to your friend that he's not the daddy.
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