Make a key'

1
Pedigree Chart Practice

• Make a key.
• How many marriages are present?
• How many generations are shown?
• How many males are PTC non-tasters?
• How many females are PTC tasters?
• How many children did 1 and 2 have?

2
1
2
3
4
tt
tt
Tt
T_
4
5
3
7
8
2
6
1
tt
Tt
Tt
Tt
Tt
Tt
Tt
Tt
2. 3 marriages 3. 3 generations 4. 4 5. 8 6. 4
children
4
3
1
2
tt
tt
Tt
Tt
1. Key T dominant PTC taster t recessive
non- PTC taster shaded