The number of chromosomes are present in human cell
a) 22 pairs
b) 23 pairs
c) 24 pairs
d) 26 pairs

Options

A. 22 pairs
B. 23 pairs
C. 24 pairs
D. 26 pairs

Answer

To solve the question regarding the number of chromosomes present in a human cell, we can follow these steps:

### Step 1: Understand Chromosomes
Chromosomes are structures within cells that contain DNA. In humans, chromosomes come in pairs.

### Step 2: Know the Total Number of Chromosomes
Humans typically have a total of 46 chromosomes. This total is made up of pairs.

### Step 3: Calculate the Number of Pairs
Since there are 46 chromosomes in total, we can find the number of pairs by dividing the total number of chromosomes by 2:
- 46 chromosomes ÷ 2 = 23 pairs of chromosomes.

### Step 4: Identify Types of Chromosomes
Out of these 23 pairs:
- 22 pairs are called autosomes, which are the chromosomes that do not determine sex.
- 1 pair is known as sex chromosomes, which determine the biological sex of the individual (XX for female and XY for male).

### Step 5: Choose the Correct Answer
Given the options:
a) 22 pairs
b) 23 pairs
c) 24 pairs
d) 26 pairs

The correct answer is **b) 23 pairs**.

### Final Answer
The number of chromosomes present in a human cell is **23 pairs**.

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