1. IPTG can be used in the laboratory as a synthetic inducer of the lac operon, instead of lactose. Using your knowledge of how the lac operon is regulated, predict whether these gene products (B -galactosidase, lactose Permease) will be produced (yes (+)/no (-)) in the presence or absence of the inducer IPTG in the following partial diploids +IPTG -IPTG B-galactosidase Permease B-galactosidase Permease (A) I+P-O+Z-Y+/ I-P+O°Z+Y- (B) I'P+O°Z+Y-/ I+P+O+Z-Y+ (C) I+P+O+Z-Y+/ I-P+O+Z+Y- (D) I+P+O°Z-Y+/ I*P+Q+Z+Y+ (E) I+P-O°Z+Y+/I-P+O+Z+Y+

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**Title:** Prediction of Gene Product Expression in the Presence of IPTG as a Lac Operon Inducer

**Objective:** 
Understand the effect of IPTG, a synthetic inducer, on the lac operon regulation and predict the production of gene products (β-galactosidase and lactose permease) in various partial diploids.

**Experiment Overview:** 

1. **Description:** 
   IPTG can be used in the laboratory as a synthetic inducer of the lac operon instead of lactose. Your task is to predict whether these gene products (β-galactosidase and lactose permease) will be produced (Yes (+) / No (-)) in the presence or absence of the inducer IPTG.
   
2. **Experimental Setup:** 
   Various partial diploids are illustrated with the presence (+) or absence (-) of IPTG. The gene components (I, P, O, Z, Y) denote the operon’s segments with possible alterations or mutations (e.g., I^s, O^c).

**Structure and Gene Representation:**

- **I:** Repressor gene
- **P:** Promoter
- **O:** Operator
- **Z:** β-galactosidase
- **Y:** Permease

**Instructions:**

Below are the different combinations of partial diploids with blank columns to be completed with either a Yes (+) or No (-) for the production of β-galactosidase and permease both in the presence (+IPTG) and absence (-IPTG) of the inducer.

---

**Partial Diploids and Predictions:**

- **(A)** I+P-O+Z-Y+ / I-P+O^cZ+Y-

  | Condition        | β-galactosidase | Permease      | β-galactosidase | Permease      |
  |------------------|-----------------|---------------|-----------------|---------------|
  | **+IPTG**        |                 |               |                 |               |
  | **-IPTG**        |                 |               |                 |               |

- **(B)** I^sP+O^cZ+Y- / I+P+O+Z-Y+

  | Condition        | β-galactosidase | Permease      | β-galactosidase | Permease      |
  |
Transcribed Image Text:**Title:** Prediction of Gene Product Expression in the Presence of IPTG as a Lac Operon Inducer **Objective:** Understand the effect of IPTG, a synthetic inducer, on the lac operon regulation and predict the production of gene products (β-galactosidase and lactose permease) in various partial diploids. **Experiment Overview:** 1. **Description:** IPTG can be used in the laboratory as a synthetic inducer of the lac operon instead of lactose. Your task is to predict whether these gene products (β-galactosidase and lactose permease) will be produced (Yes (+) / No (-)) in the presence or absence of the inducer IPTG. 2. **Experimental Setup:** Various partial diploids are illustrated with the presence (+) or absence (-) of IPTG. The gene components (I, P, O, Z, Y) denote the operon’s segments with possible alterations or mutations (e.g., I^s, O^c). **Structure and Gene Representation:** - **I:** Repressor gene - **P:** Promoter - **O:** Operator - **Z:** β-galactosidase - **Y:** Permease **Instructions:** Below are the different combinations of partial diploids with blank columns to be completed with either a Yes (+) or No (-) for the production of β-galactosidase and permease both in the presence (+IPTG) and absence (-IPTG) of the inducer. --- **Partial Diploids and Predictions:** - **(A)** I+P-O+Z-Y+ / I-P+O^cZ+Y- | Condition | β-galactosidase | Permease | β-galactosidase | Permease | |------------------|-----------------|---------------|-----------------|---------------| | **+IPTG** | | | | | | **-IPTG** | | | | | - **(B)** I^sP+O^cZ+Y- / I+P+O+Z-Y+ | Condition | β-galactosidase | Permease | β-galactosidase | Permease | |
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