Question 1a: Different species of plants in the genusCookesonivary in flower color. Species A,
B, and C have red flowers, species D, E, and F have blue flowers, and species G, H, and I have
green flowers. Given this information, can you tell which flower colors evolved from ancestors
of which other color? Why or why not?
Question 1b) Two teams of systematists (people who study phylogenetic relationships) have
been assembled. Team A proposes the cladogram indicated at right (labeled Team A) and
Team B proposed the cladogram below at right (labeled, you guessed it, Team B).
Draw the location of changes in flower color on both of these trees, and indicate the direction of
the change (e.g. R -> G would be Red to Green). Do the two teams agree in their interpretations
of the evolution of flower color? Explain.
Question 1c) Team C has been called in to offer a third opinion. They present the cladogram at
right:
Does this phylogeny support the interpretations of either Team A or Team B? If so, which one?
Explain your reasoning.
(note: i can\'t upload the picture here, but somebody post this same question on chegg with three
polygenetic trees)
Solution
Red color solved first as many pigment present in plant is responsible for red color
After some modifications blue color derived from the red pigment lastly green color evolved.
Question 1a Different species of plants in the genusCookesonivary i.pdf
1. Question 1a: Different species of plants in the genusCookesonivary in flower color. Species A,
B, and C have red flowers, species D, E, and F have blue flowers, and species G, H, and I have
green flowers. Given this information, can you tell which flower colors evolved from ancestors
of which other color? Why or why not?
Question 1b) Two teams of systematists (people who study phylogenetic relationships) have
been assembled. Team A proposes the cladogram indicated at right (labeled Team A) and
Team B proposed the cladogram below at right (labeled, you guessed it, Team B).
Draw the location of changes in flower color on both of these trees, and indicate the direction of
the change (e.g. R -> G would be Red to Green). Do the two teams agree in their interpretations
of the evolution of flower color? Explain.
Question 1c) Team C has been called in to offer a third opinion. They present the cladogram at
right:
Does this phylogeny support the interpretations of either Team A or Team B? If so, which one?
Explain your reasoning.
(note: i can't upload the picture here, but somebody post this same question on chegg with three
polygenetic trees)
Solution
Red color solved first as many pigment present in plant is responsible for red color
After some modifications blue color derived from the red pigment lastly green color evolved
