Question

for the following problem please provide me a key for allele symbols, the genotype for each parent, a punnett square with the male and female symbols, and answers to the questions.
codominance is also seen in plants. a "female" rhododendron with only red flowers is crossed with a "male rhododendron with only white flowers. what will the genotypes and phenotypes of the offspring be? (use Ii as the allele)

Answer 1

Key for allele symbols
- I = allele for red flowers
- i = allele for white flowers

Parental genotypes
- Female (only red flowers): II (homozygous red)
- Male (only white flowers): ii (homozygous white)

Punnett square (♀ across top, ♂ down side)

♀: I I
♂: i Ii Ii
i Ii Ii

Offspring (F1) answers
- Genotypes: 100% Ii (all heterozygous)
- Phenotypes: 100% show codominance — both red and white flowers (e.g., bicolored or spotted red-and-white)
- Ratios: genotypic = 1.0 Ii : 0 II : 0 ii (or 100% Ii); phenotypic = 100% red+white, 0% red-only, 0% white-only

(Explanation: with codominance the Ii heterozygote expresses both parental colors simultaneously, so every offspring will display both red and white.)