the ratios of the offspring of crosses for multiple genes. Cross 1 AaBb x AaBb Cross 2 AaBbCc x AaBbCc a) Please use a branching diagram to find the genotypic ratios of the offspring of cross 1 illustrated above and complete with the resulting genotypes and ratios. (You do not need to upload the branch diagrams!) How many different genotypes are there in the offspring of this cross? Genotype ratios for the offspring of Cross 1 (please indicate both the ratio and the genotype for each one: e.g.: 3AABB:1aabb, etc): b) Please use a branching diagram to find the phenotypic ratios of the offspring of cross 2 and complete below the resulting phenotypes and ratios. (You do not need to upload the branch diagrams!) How many different phenotypes are in the offspring of this cross? Phenotype ratios for the offspring of Cross 2 (please indicate both the ratio and the phenotype for each one using D and R for dominant and recessive phenotypes respectively, for example 1DDD:2DRR, etc.): c) What mathematical operation are you using to calculate the ratios for multiple genes and what assumption are you making to be able to use it? I am using because I am making an assumption of

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please answer parts a, b, and c

**THEME 2: Analyzing Genetic Cross Ratios**

Under certain conditions, the ratios of offspring from single-gene crosses can be used to predict the ratios of offspring in crosses involving multiple genes.

**Crosses:**
- **Cross 1:** AaBb x AaBb
- **Cross 2:** AaBbCc x AaBbCc

**Tasks:**

a) Use a branching diagram to find the **genotypic ratios** of the offspring for Cross 1 and complete the genotypes and ratios.

- **Question:** How many different genotypes are there in the offspring of this cross?  
  **Input box provided for answer.**

- **Task:** Fill in the genotypic ratios for the offspring of Cross 1 (e.g., 3AABB:1aabb).  
  **Input box provided for answer.**

b) Use a branching diagram to find the **phenotypic ratios** of the offspring for Cross 2 using D (dominant) and R (recessive) for phenotypes.

- **Question:** How many different phenotypes are in the offspring of this cross?  
  **Input box provided for answer.**

- **Task:** Fill in the phenotypic ratios for the offspring of Cross 2 (e.g., 1DDD:2DRR).  
  **Input box provided for answer.**

c) Consider the mathematical operation used to calculate the ratios for multiple genes and the assumption made for its use.

- **Task:** Indicate the operation and the assumption in the input boxes:  
  - **Operation:**  
  - **Assumption:**  

This exercise involves understanding how to generate and interpret genotypic and phenotypic ratios using genetic branches based on the principles of Mendelian inheritance.
Transcribed Image Text:**THEME 2: Analyzing Genetic Cross Ratios** Under certain conditions, the ratios of offspring from single-gene crosses can be used to predict the ratios of offspring in crosses involving multiple genes. **Crosses:** - **Cross 1:** AaBb x AaBb - **Cross 2:** AaBbCc x AaBbCc **Tasks:** a) Use a branching diagram to find the **genotypic ratios** of the offspring for Cross 1 and complete the genotypes and ratios. - **Question:** How many different genotypes are there in the offspring of this cross? **Input box provided for answer.** - **Task:** Fill in the genotypic ratios for the offspring of Cross 1 (e.g., 3AABB:1aabb). **Input box provided for answer.** b) Use a branching diagram to find the **phenotypic ratios** of the offspring for Cross 2 using D (dominant) and R (recessive) for phenotypes. - **Question:** How many different phenotypes are in the offspring of this cross? **Input box provided for answer.** - **Task:** Fill in the phenotypic ratios for the offspring of Cross 2 (e.g., 1DDD:2DRR). **Input box provided for answer.** c) Consider the mathematical operation used to calculate the ratios for multiple genes and the assumption made for its use. - **Task:** Indicate the operation and the assumption in the input boxes: - **Operation:** - **Assumption:** This exercise involves understanding how to generate and interpret genotypic and phenotypic ratios using genetic branches based on the principles of Mendelian inheritance.
Expert Solution
Step 1: Dihybrid and Trihybrid cross

Trihybrid crosses and dihybrid crosses are genetic studies of two or three distinct traits to examine inheritance patterns. These hybrids demonstrate the complex interactions between genes during inheritance.

Two traits with two different alleles each are examined in a dihybrid cross, resulting in complex genotypic and phenotypic ratios.

In a trihybrid cross, three traits are taken into account at once, highlighting the complex interplay of various alleles.

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