Human genome consists how many number of genes :-

Options

A. 3000
B. 30000
C. `3 xx 10^(9)`
D. 40000

Answer

To determine how many genes are present in the human genome, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the number of genes in the human genome.

2. **Review the Options**: The options provided are:
- 3000
- 30000
- 3x10^-9
- 40000

3. **Recall Information about the Human Genome**:
- It is known that the human genome is quite complex and was previously estimated to contain a higher number of genes (between 80,000 to 100,000).
- Recent studies have revised this estimate.

4. **Identify the Correct Estimate**:
- Current estimates suggest that the human genome consists of approximately 30,000 genes. This is the most accepted figure based on recent genomic studies.

5. **Eliminate Incorrect Options**:
- 3000 genes is too low based on current understanding.
- 3x10^-9 is not a valid option for the number of genes; it refers to a quantity in scientific notation that does not apply here.
- 40000 genes is also incorrect as it exceeds the current estimate.

6. **Conclude the Answer**:
- Therefore, the correct answer is 30,000 genes.

### Final Answer:
The human genome consists of approximately **30,000 genes**.

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