Carotenoids are a group of pigments found in many plant species. They are formed

Question

Carotenoids are a group of pigments found in many plant species. They are formed via the ter id pathway. Lycopene (Lyc) is a red colored pigment carotene (Car) is orange and Lutein (Lut) yellow. The precursor molecule phytoene is colorless (white). See figure 1 a. Red flower color in Coneflowers is dominant to white. (1pt) What symbols would you use to represent the genotypes of a heterozygous red flowered plant and a white flowered plant? What would the expected phenotypic ratios be in a cross of these parents? b. Red flowered cone flowers x white flowered ones leads to yellow flowered coneflowers. What would explain this, that is how would genotype link to ook at the figure? (2pts) phenotype t is actually easier to map this as a two-locus interaction (see Labradors in the book). If you crossed F1 plants that were heterozygous at both oci, what would the genotypes and phenotypes be in a population of 100 progeny? (3pts)

Explanation / Answer

Genotype for Heterozygous red plant Rr

P - Rr / Rr * rR/rR

F1 - Rr / rR

F2 – 1 - Rr / Rr - Phenotype R r

        2 - Rr / rR   - Phenotype R R

        1 – rR / rR   - Phenotype r R

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