Go through the features of human genome
(i) Largest human gene is dystrophin with 2.4 million bases
(ii) Chromosome 1 has maximum number of genes, i.e., 2968 and y-chromosome has minimum number, i.e., 231
(iii) the human genome contains 3164.7 billion nucleotide bases
(iv) The total number of genes is estimated at 30,000
Which of these are correct?

Options

A. (i), (ii) & (iii)
B. (ii),(iv)
C. (i), (ii) & (iv)
D. All are correct

Explanation

To determine which statements about the human genome are correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement 1: The largest human gene is dystrophin with 2.4 million bases.**
- The dystrophin gene is indeed the largest known human gene, and it spans approximately 2.4 million bases.
- **Conclusion:** This statement is **correct**.

2. **Statement 2: Chromosome 1 has the maximum number of genes, i.e., 2968, and the Y chromosome has the minimum number, i.e., 231.**
- Chromosome 1 is known to contain the highest number of genes, estimated at around 2968. Conversely, the Y chromosome has the fewest genes, with approximately 231.
- **Conclusion:** This statement is **correct**.

3. **Statement 3: The human genome contains 3164.7 billion nucleotide bases.**
- The human genome actually consists of about 3 billion nucleotide bases (3,000 million), not 3164.7 billion.
- **Conclusion:** This statement is **incorrect**.

4. **Statement 4: The total number of genes is estimated at 30,000.**
- Current estimates suggest that the human genome contains approximately 20,000 to 25,000 genes, but some estimates do go up to around 30,000.
- **Conclusion:** This statement is **correct**.

### Summary of Correct Statements:
- Correct statements: **1, 2, and 4**
- Incorrect statement: **3**

### Final Answer:
The correct statements about the features of the human genome are **1, 2, and 4**.

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