The approximate number of genes contained in the genome of Kalpana Chawla was

Options

A. 40000
B. 30000
C. 80000
D. 1,00,000

Answer

To determine the approximate number of genes contained in the genome of Kalpana Chawla, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Genome**:
- A genome is the complete set of genes or genetic material present in a cell or organism. In humans, it consists of DNA organized into chromosomes.

2. **Human Genome Characteristics**:
- The human genome contains approximately 3 billion base pairs of DNA, which are organized into 46 chromosomes.

3. **Number of Genes in Humans**:
- Research indicates that the total number of genes in the human genome is around 21,000. This is the baseline figure we will use for our calculations.

4. **Analyzing the Options Given**:
- The options provided are:
- A) 40,000
- B) 30,000
- C) 80,000
- D) 1 lakh (100,000)
- Since 21,000 is not listed among the options, we need to find the closest approximation.

5. **Choosing the Closest Option**:
- The closest option to 21,000 from the given choices is 30,000 (Option B). The other options (40,000, 80,000, and 1 lakh) are significantly higher than 21,000.

6. **Final Answer**:
- Therefore, the approximate number of genes contained in the genome of Kalpana Chawla is best represented by the option **30,000**.