Let’s solve each Punnett square one by one.
We are told:
- T = tall (dominant)
- t = short (recessive)
- TT = dominant tall → genotype: tall, phenotype: tall
- Tt = mixed hybrid → genotype: hybrid, phenotype: tall
- tt = recessive short → genotype: short, phenotype: short
---
First Punnett Square (Top Left):
Parents: Both are dominant tall → so both parents are
TT
Grid:
```
T T
T TT TT
T TT TT
```
All 4 offspring are
TT
So the 4 possible offspring names are:
1. TT
2. TT
3. TT
4. TT
But since they’re all the same, we can list them as such.
---
Second Punnett Square (Top Right):
Parents: Both are mixed hybrids → so both parents are
Tt
Grid:
```
T t
T TT Tt
t Tt tt
```
Offspring:
1. TT → dominant tall
2. Tt → mixed hybrid
3. Tt → mixed hybrid
4. tt → recessive short
Expected ratio: 1 TT : 2 Tt : 1 tt
Phenotype ratio: 3 tall : 1 short
But the question asks to “name the 4 possible offspring” — so we list each box’s result.
So:
1. TT
2. Tt
3. Tt
4. tt
---
Third Punnett Square (Bottom Left):
One parent is dominant tall (
TT), one is mixed hybrid (
Tt)
Grid:
```
T T
T TT TT
t Tt Tt
```
Offspring:
1. TT
2. TT
3. Tt
4. Tt
So:
1. TT
2. TT
3. Tt
4. Tt
---
Fourth Punnett Square (Bottom Right):
Both parents are recessive short → so both are
tt
Grid:
```
t t
t tt tt
t tt tt
```
All 4 offspring are
tt
So:
1. tt
2. tt
3. tt
4. tt
---
Now, let’s write the final answers clearly for each section.
Final Answer:
Top Left (Both parents dominant tall):
1. TT
2. TT
3. TT
4. TT
Top Right (Both parents mixed hybrids):
1. TT
2. Tt
3. Tt
4. tt
Bottom Left (One dominant tall, one mixed hybrid):
1. TT
2. TT
3. Tt
4. Tt
Bottom Right (Both parents recessive short):
1. tt
2. tt
3. tt
4. tt
Parent Tip: Review the logic above to help your child master the concept of punnett square worksheet 1.