The number of nucleotide base pairs in the haploid set of human chromosomes

Options

A. 1.5 billions
B. 316.47 billions
C. 3 billions
D. 240 million

Answer

To determine the number of nucleotide base pairs in the haploid set of human chromosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Chromosomal Structure**:
- Humans have a total of 46 chromosomes, which are organized into 23 pairs. This means that in a diploid set (2n), there are 46 chromosomes.

2. **Identify the Haploid Set**:
- The haploid set (n) refers to half the number of chromosomes, which is 23 chromosomes in humans. This is the set that is present in gametes (sperm and egg cells).

3. **Determine the Total Number of Nucleotide Base Pairs**:
- The total number of nucleotide base pairs in the diploid human genome is approximately 3 billion (3 x 10^9). This is the total for all 46 chromosomes.

4. **Calculate the Nucleotide Base Pairs in the Haploid Set**:
- Since the haploid set contains half the number of chromosomes, we can find the number of nucleotide base pairs in the haploid set by dividing the total number of base pairs by 2.
- Therefore, 3 billion base pairs divided by 2 equals 1.5 billion base pairs.

5. **Final Answer**:
- The number of nucleotide base pairs in the haploid set of human chromosomes is 1.5 billion.

### Conclusion:
The answer to the question is that there are **1.5 billion nucleotide base pairs in the haploid set of human chromosomes**.

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