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Anonymous asked in Science & MathematicsZoology · 1 decade ago

Please help me with a dyhybrid cross?

We are working on dihybrid crosses in biology class, and I am just not getting it. Here is what the problem says: In a certain set of lab mice, black hair is dominant to white hair, and coarse hair is dominant to fine hair. Determine the percentage of black, fine-haired offspring that will result if two mice heterozygous for both of these traits are mated. Draw a Punnet Square to support your answer.

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When I did this, I got 2/16 or1/8....is that right?

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  • 1 decade ago
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    No, It's 3 of 16. The ratio is always going to be 9:3:3:1 on a dihybrid cross with 9 being coarse black, 3 being coarse white, 3 being fine black, and 1 being fine white. Check your Punnett square again for accurate count.

    Have a great 2007! Bio class is half over.

    Source(s): Bio major
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