Questions: <Homework: Chapter 14 Incomplete Dominance and Codominance Reset Help Submit - Part C - Crossing the forked and twist mutants

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Solution

Solution Steps

Step 1: Parental Generation

The pure lines are crossed: a pale flower (pp) with a forked bract and a yellow flower (ff) with a normal bract.

Step 2: F1 Generation

Crossing pp and ff results in all heterozygous offspring (pf) with pale yellow flowers and forked bracts. This demonstrates incomplete dominance for flower color (pale yellow is intermediate between pale and yellow) and forked bracts appear to be completely dominant to regular bracts.

Step 3: F2 Generation

Crossing two F1 plants (pf x pf) will give the following F2 generation.

Flower Color and Bract Shape:
- pp: pale flower, forked bract (1/4)
- pf: pale yellow flower, forked bract (2/4)
- ff: yellow flower, forked bract (1/4)

Final Answer:

Crossing the forked and field mutants will result in all F1 progeny having forked bracts. In the F2 generation, all plants will have forked bracts. The flower color will vary, with a 1:2:1 ratio of pale:pale yellow:yellow.

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