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 Trees
9. Phylogeny - evolutionary history for
group of species.
 Uses evidence from

living species, fossil record, & molecular
data (DNA)
 shown
with branching tree diagrams
Phylogenetic Trees
Different
Species
Oldest
Ancestor
Evolution events
(new traits or
speciation)
Phylogenetic
Trees
Speciation is
which type
 Scientists
use offossil
record,
evolution?
structural comparisons and
DNA to construct trees.
 Each
time a branch
divides, it shows
emergence of a new
species.
Feathers
Large
forehead
Which 2 organisms are Most closely
related???
Feathers
Large
forehead
How many species does this
phylogenetic tree show???
Feathers
Large
forehead
Name one of the evolution events
Feathers
Large
forehead
Which species have large foreheads?
Phylogenetic Trees
Look back at your
family tree…how
 # of branches
indicates
many branches
the degree
to which 2
between you and
organisms aare
related.
cousin?
 Think,
are you more
closely related to your
sibling or your 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.
Closure
1.
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?