genomics and proteomics

Questions & Answers

Question 31659

Verified

Genomics and Proteomics

TRUE OR FALSE: Rotating branches around nodes is the same thing as cutting them off and then putting them in different places on the tree.

False

True

Question 31656

Verified

Genomics and Proteomics

The tree below is the one that you are looking at (or should be!) for this exercise. Your classmate says that if you rotate around the node that joins Peaks 1 and 4, the flowers on Peak1 will have blue spurs. What would you say about this?

"If you do this, then both Peak 1 and Peak 4 columbines will have blue spurs"

"Rotating nodes does not change the evolution of the traits on the tree"

If I rotated around the node that joins Peaks 1, 3 and 4

There is no way this can change

Question 31654

Verified

Genomics and Proteomics

Imagine you started the Tree Building Challenge with columbines starting on Peak 2 (HINT - you can actually do this by resetting the simulation until they start there!). Which of the following steps could be involved in making the tree below (the same one from the workbook)? Select all that apply- they might not be in order, but that's okay. Just pick the ones that you would actually have to do to build the correct tree.THERE MAY BE MORE THAN ONE WAY TO BUILD THIS TREE!!That's okay. Just choose from the steps that would work to make this happen.

peak 3-> peak 1

\text { peak 2 -> peak } 3

\text { peak 3 ->peak } 4

\square \quad \text { peak 1 -> peak 4 }

peak 1-> peak 2

\Gamma \quad \text { peak } 2->\text { peak } 1

Question 31652

Verified

Genomics and Proteomics

Imagine that you wanted to build a tree where columbines onPeak 2 were most closely related to only columbines on Peak3. What would you do when building your tree to accomplish this?

Make sure your simulation starts on Peak 3 and then immediately move columbines to Peak 2

Move columbines between the two peaks at the last step

Move columbines between the two peaks at the first step

Make sure your simulation starts on Peak 2 and then immediately move columbines to Peak 3

Question 31651

Verified

Genomics and Proteomics

Consider the tree of columbines below. Given what you see here, which peak had columbines on it first?

Peak 1

Peak 4

Peak 3

Peak 2

Question 31650

Verified

Genomics and Proteomics

Given your experience with playing around building trees,evaluate the statement below:

The structure of the phylogenetic trees tell us something about the order in which the peaks were colonized.

Question 31649

Verified

Genomics and Proteomics

Your classmate says that when they ran their simulation,anthers were the first trait to mutate (from white to yellow).When you tell your classmate that in your tree the anthers did not mutate after 800 years, they indicate that they think you did something wrong. What would you tell your classmate?Choose the answer that best fits this situation.

"You are right. All of the mutations should show up within 800 years."

"Hmmm. I guess I did do something wrong. My tree should be the same as yours."

"Every simulation is different, and the mutations arise at random. It is completely possible that another colour might not mutate at all."

Question 31648

Verified

Genomics and Proteomics

In the columbine tree, what do branch lengths represent?

the branch lengths correspond to the number of mutations that have occurred

the branch lengths arbitrary (they do not represent anything)are

the branch lengths correspond to time

the branch lengths correspond to the number of seeds that established a new population

Question 31647

Verified

Genomics and Proteomics

As time passes, when and where do new traits arise in the columbine populations?

randomly through time and randomly on different peaks

randomlyon different peaks, but at regular intervals through time

randomly through time, but always when a population appears on apreviously uninhabited peak

at the same time as they establish a population on a new peak

Question 31646

Verified

Genomics and Proteomics

Consider the tree below that was obtained by doing the Growing Tree exercise. Which traits do you expect to differ between the flowers on Peak 4 and those of the common ancestor of all populations? Select all that apply.

stripes

spur length

petal tips

petal colour

spur colour

anthers

blade colour

stigmas

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