| BIOLOGY 102 PUNNETT SQUARES | ||||
| Monohybrid, Dihybrid, and Trihybrid Crosses | ||||
| Shading in each Punnett Square represents matching phenotypes, assuming complete dominance and independant assortment of genes, phenotypic ratios are also presented. |
| Monohybrid Cross (F1 Generation) | ||||
A |
A |
|||
a |
Aa |
Aa |
||
a |
Aa |
Aa |
||
Phenotypic Ratio |
||||
4 |
0 |
|||
| Monohybrid Cross (F2 Generation) | ||||
A |
a |
|||
A |
AA |
Aa |
||
a |
Aa |
aa |
||
Phenotypic Ratio |
||||
3 |
1 |
|||
| Dihybrid Cross (F2 Generation) | ||||
AB |
Ab |
aB |
ab |
|
AB |
AABB |
AABb |
AaBB |
AaBb |
Ab |
AABb |
AAbb |
AaBb |
Aabb |
aB |
AaBB |
AaBb |
aaBB |
aaBb |
ab |
AaBb |
Aabb |
aaBb |
aabb |
Phenotypic Ratio |
||||
9 |
3 |
3 |
1 |
|
| Trihybrid Cross (F2 Generation) | ||||||||
ABD |
ABd |
AbD |
Abd |
aBD |
aBd |
abD |
abd |
|
ABD |
AABBDD |
AABBDd |
AABbDD |
AABbDd |
AaBBDD |
AaBBDd |
AaBbDD |
AaBbDd |
ABd |
AABBDd |
AABBdd |
AABbDd |
AABbdd |
AaBBDd |
AaBBdd |
AaBbDd |
AaBbdd |
AbD |
AABbDD |
AABbDd |
AAbbDD |
AAbbDd |
AaBbDD |
AaBbDd |
AabbDD |
AabbDd |
Abd |
AABbDd |
AABbdd |
AAbbDd |
AAbbdd |
AaBbDd |
AaBbdd |
AabbDd |
Aabbdd |
aBD |
AaBBDD |
AaBBDd |
AaBbDD |
AaBbDd |
aaBBDD |
aaBBDd |
aaBbDD |
aaBbDd |
aBd |
AaBBDd |
AaBBdd |
AaBbDd |
AaBbdd |
aaBBDd |
aaBBdd |
aaBbDd |
aaBbdd |
abD |
AaBbDD |
AaBbDd |
AabbDD |
AabbDd |
aaBbDD |
aaBbDd |
aabbDD |
aabbDd |
abd |
AaBbDd |
AaBbdd |
AabbDd |
Aabbdd |
aaBbDd |
aaBbdd |
aabbDd |
aabbdd |
Phenotypic Ratio |
||||||||
27 |
9 |
9 |
9 |
3 |
3 |
3 |
1 |
|