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Mice have two different genes for hair color, A, which codes for black fur and, a, which codes for brown fur.
If mice display complete dominance, what would be the result of crossing two individuals who are both heterozygous for fur color?
The mice would all be brown.
The mice would show a ratio of 3 black : 1 brown.
The mice would all be black.
The mice would show a ratio of 2 black: 2 brown.