Name_________________________
Hw: Using a Cladogram to Show Relationships
Directions: The following table shows the presence or absence of six traits within 7
dinosaurs. Use the information in the table to answer the questions below.
Reference: p 466 – 467, Minilab 17-2
Data Table: Derived Traits of Dinosaurs.
Dinosaur Trait
Hole in Hip Socket
A
Yes
B
Yes
C
Yes
D
Yes
E
Yes
F
Yes
G
Yes
Extension of Pubis
Bone
Unequal Enamel on
Teeth
Skull has “shelf” in
Back
Grasping Hand
No
No
No
Yes
Yes
Yes
Yes
No
No
No
No
Yes
Yes
Yes
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Three-toed Hind Foot
Yes
Yes
No
No
No
No
No
Questions:
1. Complete the cladogram below by filling in the traits (numbers) and the letter for
each dinosaur. (on attached sheet)
2. How many traits does dinosaur F share with dinosaur C? with dinosaur D? with
dinosaur E?
3. Traits that evolved early (hip in socket) are called primary traits. Traits that
evolved later ( grasping hand) are called derived traits. Are primitive traits shared
by broader or smaller groups (clade)? Are derived traits typical of broader or
smaller groups (clade)?
4. From number 2 above give an example in each case
1. Directions: On Line, write the derived trait of the Dinsosaur. In the box, write the
Letter representing each dinosaur.
6
5
3
4
2
1