Set of chromosomes present in primary spermatocyte of human being is
A. diploid / `2N`
B. `44 + XY`
C. `22 + X`
D. `22 + Y`

Options

A. A, B
B. A, B, C
C. C, D
D. A, B, C, D

Answer

To solve the question regarding the set of chromosomes present in a primary spermatocyte of a human being, we can follow these steps:

### Step 1: Understand the Definition of Primary Spermatocyte
A primary spermatocyte is a cell that undergoes meiosis to form sperm cells. It is derived from spermatogonia through mitotic division.

**Hint:** Remember that primary spermatocytes are formed from spermatogonia, which are diploid.

### Step 2: Determine the Chromosome Number
In humans, the diploid number of chromosomes is 46, which consists of 22 pairs of autosomes (44 chromosomes) and 1 pair of sex chromosomes (X and Y).

**Hint:** Recall that diploid cells have two sets of chromosomes, one from each parent.

### Step 3: Identify the Chromosome Composition
The primary spermatocyte, being diploid, contains:
- 44 autosomes (22 pairs)
- 1 pair of sex chromosomes (X and Y)

Thus, the total composition can be represented as 44 + XY.

**Hint:** Consider how many chromosomes are in the sex chromosome pair for males.

### Step 4: Evaluate the Options
Now, let's evaluate the provided options:
- **A. Diploid / 2N:** This is correct since primary spermatocytes are diploid.
- **B. 44 + XY:** This is also correct as it accurately describes the chromosome composition.
- **C. 22 + X:** This is incorrect; this represents a secondary spermatocyte.
- **D. 22 + Y:** This is also incorrect for the same reason as option C.

**Hint:** Compare the options with the information gathered about the primary spermatocyte.

### Step 5: Conclusion
The correct answers are A (Diploid / 2N) and B (44 + XY). Therefore, the primary spermatocyte has a set of chromosomes represented by both options A and B.

**Final Answer:** The set of chromosomes present in a primary spermatocyte of a human being is both A and B.