More than 200 chromosomes occur in

Options

A. Chicken
B. Dog
C. Amoeba
D. Gorilla

Answer

To determine which organism has more than 200 chromosomes, we can analyze the chromosome numbers of the given options: chicken, dog, amoeba, and gorilla.

### Step-by-Step Solution:

1. **Understanding Chromosome Numbers**:
- Chromosomes are structures within cells that contain DNA. The number of chromosomes varies widely among different species.

2. **Analyzing Each Organism**:
- **Chicken**: The diploid number (2n) of chromosomes in chickens is 78. Therefore, the haploid number (n) is 39 (2n = 78, so n = 78/2).
- **Dog**: Similar to chickens, dogs also have a diploid number of 78 chromosomes (2n = 78), which means they also have a haploid number of 39.
- **Gorilla**: Gorillas have a diploid number of 48 chromosomes (2n = 48), resulting in a haploid number of 24 (n = 48/2).
- **Amoeba**: The amoeba, specifically the amoeba proteus, is known to have a very high number of chromosomes. It has more than 500 chromosomes in a single nucleus.

3. **Conclusion**:
- Among the options provided, only the amoeba has more than 200 chromosomes. The chicken, dog, and gorilla all have fewer than 200 chromosomes.

### Final Answer:
The organism that has more than 200 chromosomes is the **amoeba**.