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.
When I did this, I got 2/16 or1/8....is that right?
- lightening rodLv 51 decade agoFavorite Answer
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