If a body cell has 68 chromosomes at the beginning of a mitotic cell cycle, each daughter cell will have `"________"` chromosomes at the end.

Answer

To solve the question, we need to understand the process of mitosis and how it affects the chromosome number in daughter cells. Here’s the step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Initial Chromosome Count**:
- The problem states that a body cell has 68 chromosomes at the beginning of the mitotic cell cycle.

2. **Understand the Process of Mitosis**:
- Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell.

3. **Chromosome Duplication**:
- Before mitosis begins, during the S phase (Synthesis phase) of the cell cycle, the chromosomes are duplicated.
- This means that the total number of chromosomes temporarily doubles.

4. **Calculate the Total Chromosomes After Duplication**:
- If the parent cell starts with 68 chromosomes, after the S phase, it will have 68 x 2 = 136 chromosomes.

5. **Division During Mitosis**:
- During mitosis, the duplicated chromosomes are evenly divided between the two daughter cells.

6. **Determine the Chromosome Count in Each Daughter Cell**:
- Each daughter cell will receive half of the total duplicated chromosomes.
- Therefore, 136 chromosomes divided by 2 equals 68 chromosomes per daughter cell.

7. **Final Answer**:
- Each daughter cell will have **68 chromosomes** at the end of the mitotic cell cycle.

### Final Answer:
Each daughter cell will have **68** chromosomes at the end.

---