Number of autosomes in a sperm is

Options

A. 22
B. 44
C. 23
D. none of these

Answer

To determine the number of autosomes in a sperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Chromosome Types**:
- In humans, chromosomes are classified into two types: autosomes and sex chromosomes (also known as allosomes). Autosomes are non-sex chromosomes, while sex chromosomes determine the sex of the individual.

2. **Total Number of Chromosomes in Humans**:
- Humans have a total of 46 chromosomes. This includes 44 autosomes and 2 sex chromosomes.

3. **Identify the Number of Autosomes**:
- Since there are 44 autosomes in total, we need to consider how many of these are present in gametes (sperm and egg).

4. **Gamete Formation**:
- Gametes are formed through a process called meiosis, which reduces the chromosome number by half. Therefore, each gamete (sperm or egg) will have half the number of chromosomes compared to somatic (body) cells.

5. **Calculate the Number of Autosomes in Sperm**:
- Since the total number of autosomes is 44, when reduced by half during meiosis, the number of autosomes in a sperm will be:
\[ \text{Number of autosomes in sperm} = \frac{44}{2} = 22 \]

6. **Conclusion**:
- Therefore, the number of autosomes in a sperm is **22**.

### Final Answer:
The number of autosomes in a sperm is **22**.

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