2) Consider the flower color in a hypothetical plant. There is one gene (Bb) for flower color and two alleles involved (B and b). Based on this pattern, what type of inheritance are we talking about? HINT: start by writing the genotypes for each. Cross 1: gives F1: Cross 2: a) What are the parents' genotypes? b) What are the offspring's genotypes? gives F2: Blue-flowered plant x white-flowered plant all pale-blue-flowered Pale-blue F1 x pale-blue F1 27 blue 49 pale-blue 24 white

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### Inheritance Patterns of Flower Color in Plants

#### Problem Statement
Consider the flower color in a hypothetical plant. There is one gene (Bb) for flower color and two alleles involved (B and b). Based on the pattern provided, what type of inheritance are we talking about? **Hint:** Start by writing the genotypes for each case.

#### Cross 1:
- **Parents**: Blue-flowered plant (BB) x White-flowered plant (bb)
- **F1 Generation Outcome**: All pale-blue-flowered (Bb)

#### Cross 2:
- **Parents**: Pale-blue F1 (Bb) x Pale-blue F1 (Bb)
- **F2 Generation Outcome**:
  - 27 blue (BB)
  - 49 pale-blue (Bb)
  - 24 white (bb)

#### Questions:
a) What are the parents’ genotypes?
b) What are the offspring’s genotypes?

---

### Detailed Explanation:

#### Genotypes of the Parents:

**Cross 1:**
- Blue-flowered plant: **BB** (homozygous dominant)
- White-flowered plant: **bb** (homozygous recessive)
  
These genotypes result in 100% of the F1 generation having the genotype **Bb** (heterozygous), which expresses a pale-blue phenotype due to incomplete dominance.

**Cross 2:**
- Both parents are pale-blue F1 plants, each with the genotype **Bb** (heterozygous).

---

### Expected Genotypic and Phenotypic Ratios:

#### Genotypic Ratio for Cross 2 (F2 Generation):
- **BB** (homozygous dominant): 1/4 (or approximately 25%)
- **Bb** (heterozygous): 1/2 (or approximately 50%)
- **bb** (homozygous recessive): 1/4 (or approximately 25%)

#### Phenotypic Ratio for Cross 2 (F2 Generation):
Given the phenotypic expression due to incomplete dominance:
- **Blue (BB)**: 27 out of 100 (27%)
- **Pale-blue (Bb)**: 49 out of 100 (49%)
- **White (bb)**: 24 out of 100 (24%)

This observation matches the data collected in Cross 2, confirming the ratios for incomplete dominance.

---

This pattern suggests **incomplete
Transcribed Image Text:### Inheritance Patterns of Flower Color in Plants #### Problem Statement Consider the flower color in a hypothetical plant. There is one gene (Bb) for flower color and two alleles involved (B and b). Based on the pattern provided, what type of inheritance are we talking about? **Hint:** Start by writing the genotypes for each case. #### Cross 1: - **Parents**: Blue-flowered plant (BB) x White-flowered plant (bb) - **F1 Generation Outcome**: All pale-blue-flowered (Bb) #### Cross 2: - **Parents**: Pale-blue F1 (Bb) x Pale-blue F1 (Bb) - **F2 Generation Outcome**: - 27 blue (BB) - 49 pale-blue (Bb) - 24 white (bb) #### Questions: a) What are the parents’ genotypes? b) What are the offspring’s genotypes? --- ### Detailed Explanation: #### Genotypes of the Parents: **Cross 1:** - Blue-flowered plant: **BB** (homozygous dominant) - White-flowered plant: **bb** (homozygous recessive) These genotypes result in 100% of the F1 generation having the genotype **Bb** (heterozygous), which expresses a pale-blue phenotype due to incomplete dominance. **Cross 2:** - Both parents are pale-blue F1 plants, each with the genotype **Bb** (heterozygous). --- ### Expected Genotypic and Phenotypic Ratios: #### Genotypic Ratio for Cross 2 (F2 Generation): - **BB** (homozygous dominant): 1/4 (or approximately 25%) - **Bb** (heterozygous): 1/2 (or approximately 50%) - **bb** (homozygous recessive): 1/4 (or approximately 25%) #### Phenotypic Ratio for Cross 2 (F2 Generation): Given the phenotypic expression due to incomplete dominance: - **Blue (BB)**: 27 out of 100 (27%) - **Pale-blue (Bb)**: 49 out of 100 (49%) - **White (bb)**: 24 out of 100 (24%) This observation matches the data collected in Cross 2, confirming the ratios for incomplete dominance. --- This pattern suggests **incomplete
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