Bands and interbands are characteristics of:-

Options

A. Lampbrush chromosome
B. Polytene chromosome
C. Giant chromosome
D. Heterochromatin chromosome

Answer

To solve the question "Bands and interbands are characteristics of:", we will analyze the options provided and determine the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question is asking about the specific type of chromosome that exhibits bands and interbands. Bands refer to the distinct regions on a chromosome that can be stained to show a pattern, while interbands are the areas between these bands.

2. **Analyzing the Options**:
- **Option 1: Lambrush chromosome**:
- Lambrush chromosomes are known for their unique structure during meiotic prophase, but they do not typically display bands and interbands. Therefore, this option is incorrect.

- **Option 2: Polytene chromosome**:
- Polytene chromosomes are characterized by their large size and the presence of distinct bands and interbands. They are formed by the replication of DNA without cell division, leading to multiple copies of the chromosome aligned side by side. This option is likely the correct answer.

- **Option 3: Giant chromosome**:
- Giant chromosomes can refer to various types of large chromosomes, including lambrush chromosomes. However, they do not specifically refer to the banding pattern characteristic. Thus, this option is incorrect.

- **Option 4: Heterochromatin chromosome**:
- Heterochromatin refers to tightly packed forms of DNA, which do not typically exhibit the banding pattern seen in polytene chromosomes. Therefore, this option is also incorrect.

3. **Conclusion**:
- After analyzing all options, the correct answer is **Option 2: Polytene chromosome**. Polytene chromosomes are well-known for their characteristic bands and interbands.

### Final Answer:
**Bands and interbands are characteristics of: Polytene chromosome.**