Genetics worksheet with Punnett squares for human traits including eye color, hair type, and blood type.

It looks like you've uploaded an image of a genetics worksheet titled "Square Worksheet: Human Characteristics", which includes Punnett square problems related to human traits such as eye color, hair texture, and earlobe shape. However, the image is partially cut off or unclear in some areas, making it difficult to read all the text fully.

But based on what I can see, here's how to approach and solve typical problems from this type of worksheet:

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🔍 Common Traits Covered

1. Eye Color (Brown vs Blue)
- Brown eyes (B) are dominant over blue eyes (b)
- Genotype: BB or Bb → brown eyes; bb → blue eyes

2. Hair Texture (Curly vs Straight)
- Curly hair (C) is dominant over straight hair (c)
- Genotype: CC or Cc → curly; cc → straight

3. Earlobes (Free vs Attached)
- Free earlobes (F) are dominant over attached (f)
- Genotype: FF or Ff → free; ff → attached

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✔ Problem 1: Eye Color

> "Bob has brown eyes. His father has blue eyes. What is the genotype of Bob?"

#### Step-by-step:
- Blue eyes = recessive → must be bb
- So Bob’s father is bb
- Bob has brown eyes → must have at least one B
- Since he got one allele from each parent, and his father gave him b, then Bob must have gotten B from his mother.
- Therefore, Bob’s genotype is Bb

✔ Answer: Bb

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✔ Problem 2: Hair Texture

> "A woman with curly hair marries a man with straight hair. Both parents are heterozygous for hair texture. What are the possible genotypes and phenotypes of their children?"

Wait — correction: If the man has straight hair, that means he is cc (homozygous recessive). The woman has curly hair and is heterozygous, so she is Cc.

So cross: Cc × cc

| | c | c |
|-------|-------|-------|
| C | Cc | Cc |
| c | cc | cc |

#### Offspring:
- Genotypes: 50% Cc, 50% cc
- Phenotypes: 50% curly hair, 50% straight hair

✔ Answer:
- Genotypes: Cc, cc
- Phenotypes: Curly, Straight (1:1 ratio)

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✔ Problem 3: Earlobe Shape

> "Both parents have free earlobes. One parent is homozygous dominant, the other is heterozygous. What are the possible genotypes and phenotypes of the offspring?"

Let’s define:
- Homozygous dominant = FF
- Heterozygous = Ff

Cross: FF × Ff

| | F | f |
|-------|-------|-------|
| F | FF | Ff |
| F | FF | Ff |

All offspring will have free earlobes because:
- Genotypes: 50% FF, 50% Ff → all have at least one F
- Phenotype: All have free earlobes

✔ Answer:
- Genotypes: FF, Ff
- Phenotypes: All free earlobes

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📌 General Tips for Solving These Problems:

1. Identify the trait and determine dominance (e.g., B = brown eyes, b = blue).
2. Write down parental genotypes.
3. Set up a Punnett square.
4. List possible genotypes and phenotypes of offspring.
5. Use percentages or ratios (e.g., 3:1, 1:1).

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If you can provide a clearer version of the worksheet or specify which question you're stuck on, I can give a more detailed solution tailored to your exact problem!