Ruth Megido
New member
In breeding pure-breeding large and small strains of mice, you cross individuals of each strain and note that their offspring are intermediate in size. Two models (explanations) to account for this result are (1) that body size in these strains is due to one gene with alleles that show incomplete dominance and (2) that body size is a polygenic trait. How could you distinguish between these models?
- Body size is known to be an incompletely dominant trait.
- Intercross the F1 and see if the F2 contains three size classes (consistent with the incomplete dominance model) or if there is a range of sizes (consistent with the polygenic model).
- Intercross the F1 and see if there is a range of sizes in the F2 (consistent with the incomplete dominance model) or if the F2 contains only three size classes (consistent with the polygenic model).
- Intercross the F1 and see if there is a range of sizes in the F2 (consistent with the incomplete dominance model) or if the F2 contains two size classes (consistent with the polygenic model).
- Body size is known to be an incompletely dominant trait.
- Intercross the F1 and see if the F2 contains three size classes (consistent with the incomplete dominance model) or if there is a range of sizes (consistent with the polygenic model).
- Intercross the F1 and see if there is a range of sizes in the F2 (consistent with the incomplete dominance model) or if the F2 contains only three size classes (consistent with the polygenic model).
- Intercross the F1 and see if there is a range of sizes in the F2 (consistent with the incomplete dominance model) or if the F2 contains two size classes (consistent with the polygenic model).