Punnett Square interactive worksheet - Free Printable

Problem Explanation and Solution

The task involves using Punnett squares to predict the possible genotypes of offspring based on the given alleles of two parents. Let's solve each problem step by step.

---

#### Example 1: Eye Color
- Father: Dominant brown eyes (BB)
- Mother: Recessive blue eyes (bb)

Step 1: Write the alleles for the father along the top of the Punnett square.
- Father: B, B

Step 2: Write the alleles for the mother along the side of the Punnett square.
- Mother: b, b

Step 3: Fill in the Punnett square by combining the alleles.
```
B B
┌─────┬─────┐
b │ BB │ BB │
├─────┼─────┤
b │ Bb │ Bb │
└─────┴─────┘
```

Step 4: Interpret the results.
- All possible genotypes for the child are BB and Bb.
- Since both BB and Bb have at least one dominant allele (B), the child will have brown eyes.

Final Answer for Eye Color:
- Possible eye color of the child: Brown

---

#### Example 2: Hair Feature
- Father: Curly hair (Cc)
- Mother: Straight hair (cc)

Step 1: Write the alleles for the father along the top of the Punnett square.
- Father: C, c

Step 2: Write the alleles for the mother along the side of the Punnett square.
- Mother: c, c

Step 3: Fill in the Punnett square by combining the alleles.
```
C c
┌─────┬─────┐
c │ Cc │ cc │
├─────┼─────┤
c │ Cc │ cc │
└─────┴─────┘
```

Step 4: Interpret the results.
- Possible genotypes for the child are Cc and cc.
- Cc represents curly hair (dominant trait).
- cc represents straight hair (recessive trait).

Final Answer for Hair Feature:
- Possible hair features of the child: Curly or Straight

---

#### Example 3: Petal Color in Flowers
- First Flower: Red petal (RR) - Dominant
- Second Flower: Yellow petal (Rr) - Hybrid

Step 1: Write the alleles for the first flower along the top of the Punnett square.
- First Flower: R, R

Step 2: Write the alleles for the second flower along the side of the Punnett square.
- Second Flower: R, r

Step 3: Fill in the Punnett square by combining the alleles.
```
R R
┌─────┬─────┐
R │ RR │ RR │
├─────┼─────┤
r │ Rr │ Rr │
└─────┴─────┘
```

Step 4: Interpret the results.
- Possible genotypes for the offspring are RR and Rr.
- Both RR and Rr have at least one dominant allele (R), so all offspring will have red petals.

Final Answer for Petal Color:
- Possible petal color of the offspring: Red

---

#### Example 4: Seed Pod Texture in Plants
- First Plant: Smooth seed pod (SS) - Dominant
- Second Plant: Wrinkled seed pod (ss) - Recessive

Step 1: Write the alleles for the first plant along the top of the Punnett square.
- First Plant: S, S

Step 2: Write the alleles for the second plant along the side of the Punnett square.
- Second Plant: s, s

Step 3: Fill in the Punnett square by combining the alleles.
```
S S
┌─────┬─────┐
s │ Ss │ Ss │
├─────┼─────┤
s │ Ss │ Ss │
└─────┴─────┘
```

Step 4: Interpret the results.
- All possible genotypes for the offspring are Ss.
- Since Ss has at least one dominant allele (S), all offspring will have smooth seed pods.

Final Answer for Seed Pod Texture:
- Possible seed pod texture of the offspring: Smooth

---

Final Answers:

1. Eye Color: Brown
2. Hair Feature: Curly or Straight
3. Petal Color: Red
4. Seed Pod Texture: Smooth

Boxed Final Answer:
\[
\boxed{\text{Brown, Curly or Straight, Red, Smooth}}
\]