It has been found that the domestic horses have 64 chromosomes in their cell. Predict the number of chromosomes in the egg cell of a female horse.

Options

A. 16
B. 32
C. 64
D. 128

Answer

To solve the problem of determining the number of chromosomes in the egg cell of a female horse, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Chromosome Count in Horses**:
- Domestic horses have a total of 64 chromosomes in their somatic (body) cells. This number represents the diploid (2n) chromosome count.

2. **Identify the Diploid and Haploid States**:
- The diploid number (2n) is the total number of chromosomes present in somatic cells. For horses, this is 64 chromosomes.
- The haploid number (n) represents the number of chromosomes in gametes (sperm and egg cells). Gametes are produced through a process called meiosis.

3. **Calculate the Haploid Number**:
- To find the haploid number, we can use the formula:
\[ n = \frac{2n}{2} \]
- Substituting the diploid number (64) into the formula:
\[ n = \frac{64}{2} = 32 \]

4. **Conclusion**:
- Therefore, the number of chromosomes in the egg cell of a female horse is 32.

### Final Answer:
The egg cell of a female horse contains **32 chromosomes**.