How many pairs of autosomes are found in human?

Options

A. 46
B. 23
C. 1
D. 22

Answer

To determine how many pairs of autosomes are found in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Total Number of Chromosomes**:
- Humans have a total of 46 chromosomes in each somatic (body) cell.

2. **Differentiate Between Autosomes and Sex Chromosomes**:
- Chromosomes can be classified into autosomes and sex chromosomes.
- Autosomes are non-sex chromosomes, while sex chromosomes determine the sex of an individual.

3. **Identify the Number of Sex Chromosomes**:
- In humans, there are 2 sex chromosomes (XX for females and XY for males).

4. **Calculate the Number of Autosomes**:
- To find the number of autosomes, subtract the number of sex chromosomes from the total number of chromosomes:
\[ \text{Number of Autosomes} = \text{Total Chromosomes} - \text{Sex Chromosomes} = 46 - 2 = 44 \]

5. **Determine the Number of Pairs of Autosomes**:
- Autosomes are present in pairs. Therefore, to find the number of pairs of autosomes, divide the total number of autosomes by 2:
\[ \text{Number of Pairs of Autosomes} = \frac{44}{2} = 22 \]

6. **Conclusion**:
- Thus, humans have **22 pairs of autosomes**.

### Final Answer:
Humans have 22 pairs of autosomes.