Directions: Complete the following Dihybrid Cross problems.
- Identify the gametes from each parent.
- Complete a Punnett Square for the cross
- Identify the genotypes and phenotypes for the potential offspring.
- Find the phenotypic ratio for the potential offspring.
Betta (Chinese/ Siamese fighting fish) Characteristics [Upper Case= Dominant & Lower Case= Recessive]
B= Blue Tail b= black Tail
V= Veil Tail v= Crown Tail
M= Metallic Sheen m= No Metallic Sheen
F= Short Pectoral Fins (Normal) f= Long Pectoral Fins (Elephant Ears)
C= Colored Body c= White Body
Parent Cross 1
BbVv x BBvv
Answer:
| BV | Bv | bV | bv | |
| Bv | BBVv
Blue tail; veiled tail |
BBvv
Blue tail; crown tail |
BbVv
Blue tailed; veiled tail |
Bbvv
Blue tail; crown tail |
| Bv | BBVv
Blue tail; veiled tail |
BBvv
Blue tail; crown tail |
BbVv
Blue tail; veiled tail |
Bbvv
Blue tail; crown tail |
| Bv | BBVv
Blue tail; veil tail |
BBvv
Blue tail; crown tail |
BbVv
Blue tail; veil tail |
Bbvv
Blue tail; crown tail |
| Bv | BBVv
Blue tail; veil tail |
BBvv
Blue tail; crown tail |
BbVv
Blue tail; veil tail |
Bbvv
Blue tail; crown tail |
Parent Cross 2
BbMM x bbMm
Answer:
| BM | BM | bM | BM | |
| bM | BbMM
Blue tail; metallic |
BbMM
Blue tail; metallic |
bbMM
black tail; metallic |
BbMM
Blue tail; metallic |
| bm | BbMm
Blue tail; metallic |
BbMm
Blue Tail; metallic |
bbMm
black tail; metallic |
BbMm
Blue Tail; metallic |
| bM | BbMM
Blue Tail; metallic |
BbMM
Blue Tail; metallic |
bbMM
Black tail; metallic |
BbMM
Blue Tail; metallic |
| bm | BbMm
Blue Tail; metallic |
BbMm
Blue Tail; metallic |
bbMm
black tail; metallic |
BbMm
Blue Tail; metallic |
Parent Cross 3
Vvff x VvFf
Answer:
| Vf | Vf | Vf | vf | |
| VF | VVFf
Veil tail; Short pectoral |
VVFf
Veil tail; Short pectoral |
VVFf
Veil tail; Short pectoral |
VvFf
Veil tail; Short pectoral |
| Vf | VVff
Veil tail; long pectoral |
VVff
Veil tail; long pectoral |
VVff
Veil tail; long pectoral |
Vvff
Veil tail; long pectoral |
| vF | VvFf
Veil tail; Short pectoral |
VvFf
Veil tail; Short pectoral |
VvFf
Veil tail; Short pectoral |
vvFf
Crown tail; long pectoral |
| vf | Vvff
Veil tail; long pectoral |
Vvff
Veil tail; long pectoral |
Vvff
Veil tail; long pectoral |
vvff
Crown tail; long pectoral
|
Parent Cross 4
bbcc x BBCc
Answer:
| bc | bc | bc | bc | |
| BC | BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
| Bc | BbCc
Blue tail; colored body |
Bbcc
Blue tail; white body |
Bbcc
Blue tail; white body |
Bbcc
Blue tail; white body |
| BC | BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
BbCc
Blue tail; colored body |
| Bc | Bbcc
Blue tail; white body |
Bbcc
Blue tail; white body |
Bbcc
Blue tail; white body |
Bbcc
Blue tail; white body |
Parent Cross 5
CCff x CcFf
Answer:
| Cf | Cf | Cf | Cf | |
| CF | CCFf
Colored body; short pectoral |
CCFf
Colored body; short pectoral |
CCFf
Colored body; short pectoral |
CCFf
Colored body; short pectoral |
| Cf | CCff
Colored body; long pectoral |
CCff
Colored body; long pectoral |
CCff
Colored body; long pectoral |
CCff
Colored body; long pectoral |
| cF | CcFf
Colored body; short pectoral |
CcFf
Colored body; short pectoral |
CcFf
Colored body; short pectoral |
CcFf
Colored body; short pectoral |
| cf | Ccff
Colored body; long pectoral |
Ccff
Colored body; long pectoral |
Ccff
Colored body; long pectoral |
Ccff
Colored body; long pectoral |
