Question

Fill out each Punnett square based on the information in the problem. Then write in the
phenotype for each genotype and the probability of its occurrence. Let's do the first one
together.
1.) Flower Color
R = Red
r = White

RR = _____________________ = ________%
Rr = _____________________ = ________%
rr = ______________________ = ________%
Red Flowers: ___________% Chance
White Flowers: _________% Chance

Answer 1

To fill out the Punnett square for the flower color problem, we will use the following information:

- R = Red (dominant)
- r = White (recessive)

Considering the parental genotypes, let’s assume we are crossing two heterozygous plants (Rr x Rr).

**Punnett Square:**

```
R | r
----------------
R | RR | Rr
----------------
r | Rr | rr
```

**Resulting Genotypes:**

- **RR** = Red (homozygous dominant)
- **Rr** = Red (heterozygous)
- **rr** = White (homozygous recessive)

From the Punnett square, we can summarize the genotypic ratios:

1. **RR** = 1 (number of RR squares)
Phenotype: Red Flowers
Probability: \( \frac{1}{4} \times 100\% = 25\% \)

2. **Rr** = 2 (number of Rr squares)
Phenotype: Red Flowers
Probability: \( \frac{2}{4} \times 100\% = 50\% \)

3. **rr** = 1 (number of rr squares)
Phenotype: White Flowers
Probability: \( \frac{1}{4} \times 100\% = 25\% \)

Now, we can summarize the overall flower color phenotypes and their probabilities:

- **Red Flowers:** \( 25\% + 50\% = 75\% \) Chance
- **White Flowers:** \( 25\% \) Chance

Let's put everything together:

1. **RR** = Red Flowers = 25%
2. **Rr** = Red Flowers = 50%
3. **rr** = White Flowers = 25%
4. Red Flowers: 75% Chance
5. White Flowers: 25% Chance