Explain how florets morphology and distribution is different in double and tubular mutants.

BIO1102- Optional homework questions on the article “Genetic Analysis of Floral Symmetry in Van Gogh’s Sunflowers Reveals Independent Recruitment of CYCLOIDEA Genes in the Asteraceae.”
You can find the full text article at the link below:
http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1002628http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1002628
Also, a PDF file is posted on Angel. Please type your answers within the text boxes provided, except when drawing a cross.
State what is the general biological question that the authors are asking by analyzing the double mutant in the sunflower. Briefly explain its overall importance to plant biology. (2 points)
Briefly explain the evolutionary relationship between the two types of flower morphology described in the paper and how they affect pollination and plant diversification. (3 points)
Briefly describe the two different types of florets found in a wild type sunflower. Explain how florets morphology and distribution is different in double and tubular mutants. (3 points)
To generate F1 hybrid offspring, a wild-type plant was crossed with a “weak” semi-double mutant (Primrose), which shows an intermediate phenotype. Explain why the authors did not use a plant with a full double phenotype for this cross. (2 points)
Why the tubular phenotype is not observed in the F1 progeny? (2 points)
The F2 progeny from a semi-double F1 plant shows a 1:2:1 phenotypic ratio between wild-type: semi-double: double, confirming that the double allele is co-dominant to the wild-type allele (figure 2). What phenotypic classes and ratios would you observe in the F2 if the double allele was completely dominant to the wild-type allele? Draw the cross using the allele abbreviations used in the paper and show the expected phenotype/genotype correlations and ratios. (3 points)
Briefly describe the DNA alterations found in the two different mutations