2. In fruit flies: At the b locus, + = normal color b = black body At the v locus, + = normal wing v = vestigal wing A cross between a female fly heterozygous for both traits and a black bodied male with vestigial wings is made. a. Write the cross using correct symbols. What kind of cross is this called?

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Write the cross using correct symbols. What kind of cross is this called? 

### Genetics of Fruit Flies

**Problem 2: In fruit flies:**

- **At the b locus:**
  - `+` = normal color
  - `b` = black body

- **At the v locus:**
  - `+` = normal wing
  - `v` = vestigial wing

**Scenario:**

A cross is made between a female fly that is heterozygous for both traits and a male with a black body and vestigial wings.

**Task:**

- **a.** Write the cross using correct symbols. What kind of cross is this called?

#### Diagram Explanation:

The diagram shows expected and observed outcomes of fruit fly phenotypes:

- **Expected:**
  - Shows different combinations of body color and wing type, labeled with a ratio of `1`.
  
- **Observed:**
  - Lists the same combinations with a ratio of `5`, indicating discrepancies in expected versus actual results in the experiment.

#### Analysis:

This exercise appears to involve predicting genotypic and phenotypic ratios from a dihybrid cross, considering Mendelian inheritance principles.
Transcribed Image Text:### Genetics of Fruit Flies **Problem 2: In fruit flies:** - **At the b locus:** - `+` = normal color - `b` = black body - **At the v locus:** - `+` = normal wing - `v` = vestigial wing **Scenario:** A cross is made between a female fly that is heterozygous for both traits and a male with a black body and vestigial wings. **Task:** - **a.** Write the cross using correct symbols. What kind of cross is this called? #### Diagram Explanation: The diagram shows expected and observed outcomes of fruit fly phenotypes: - **Expected:** - Shows different combinations of body color and wing type, labeled with a ratio of `1`. - **Observed:** - Lists the same combinations with a ratio of `5`, indicating discrepancies in expected versus actual results in the experiment. #### Analysis: This exercise appears to involve predicting genotypic and phenotypic ratios from a dihybrid cross, considering Mendelian inheritance principles.
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