Phylogenetic Trees

Bellwork- have SLATE out!

1. Use this diagram to create your family tree. (Add parents, siblings, cousins, aunts, uncles, etc.)

2. As soon as you are finished- head out to lab for the next two evolution evidence stations

Finished early?PreAP is ready for a bigger

quiz (95% + did very well on natural selection one Wednesday) play pictionary with a neighbor or quiz each other. ANYthing in notetaker or labs is fair game.

(No dissection info or specific era dates on this quiz)

Phylogenetic Trees

Traditionally classification was based on physical similarities.

What does this guy/gal look similar to?

Phylogenetic Trees

Traditionally classification was based on physical similarities.Physical similarities are

not always the result of close relationships.

Evolved similar adaptations to a raccoon

in different environments…what

type of evolution?

Phylogenetic Trees

Modern classification uses molecular biology (DNA) to determine how similar the genes are between species. What does this

guy/gal look similar to?

Phylogenetic Trees

Modern classification uses molecular biology (DNA) to determine how similar the genes are between species. What does this

guy/gal look similar to?

Phylogenetic Trees

Modern classification uses molecular biology to determine how similar the genes are between species.Genetic similarities more accurately show

evolutionary relationships

Phylogenetic Trees9. Phylogeny - evolutionary history

for group of species. Uses evidence from

living species, fossil record, & molecular data (DNA)

shown with branching tree diagrams

Phylogenetic TreesDifferen

t Specie

s

Evolution events

(new traits or

speciation)

Oldest Ancest

or

Phylogenetic TreesScientists use fossil record, structural comparisons and DNA to construct trees.

Each time a branch divides, it shows emergence of a new species.

Speciation is which type of

evolution?

Which 2 organisms are Most closely related???

Feathers

Large forehe

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How many species does this phylogenetic tree show???

6 Feathers

Large forehe

ad

Name one of the evolution events

•Large forehead•feathers

Feathers

Large forehe

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Which species have large foreheads?

Sauropods,

Theropods & Birds

Feathers

Large forehe

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Phylogenetic Trees # of branches

indicates the degree to which 2 organisms are related.

Think, are you more closely related to your sibling or your cousin??

Look back at your family

tree…how many branches

between you and a cousin?

Automobile phylogenetic tree

ALL vehicles evolved from a PRIMATIVE 4-wheeled ancestor

Work with your partner to create a phylogenetic tree for the vehicles.

Be ready to justify your answers

The Rambler – car with 3 wheels, 4 doors, front and back seat.

The Oxen – car with 4 wheels, 4 doors, front and back seat. The Dispensor – car with 4 wheels, 2 doors, front seat only. The Rock – car with 4 wheels, 2 doors, front and back seat,

no top. The Hawk – truck with 4 wheels, 2 doors, 1 seat, 1 short bed. The Bull – truck with 4 wheels, 2 doors, 1 seat, 1 long bed. The Redwood – truck with 6 wheels, 2 doors, 1 seat. The Snake – a truck with 6 wheels, 4 doors, front and back

seat.

Closure1. What was challenging about the

activity?

2. Is there only one correct answer? Why or why not?

3. What real life challenges would phylogeneticists face when trying to figure out the evolutionary history for several species?