In a grafted plant, stock has 48 chromosomes while scion has 24 chromosomes. The chromosome number for root cells and eggs are

Options

A. 48 and 24
B. 24 and 24
C. 24 and 12
D. 48 and 12

Answer

To solve the question regarding the chromosome numbers in a grafted plant, we can break it down into a series of steps:

### Step-by-Step Solution:

1. **Understanding Grafting**:
- Grafting is a method of vegetative propagation where two plants are combined. The root system from one plant (the stock) is joined with the shoot system from another plant (the scion).

2. **Identifying Chromosome Numbers**:
- In the given question, the stock has 48 chromosomes, and the scion has 24 chromosomes.

3. **Determining Chromosome Number in Root Cells**:
- The root system comes from the stock. Therefore, the chromosome number in the root cells will be the same as that of the stock.
- Since the stock has 48 chromosomes, the root cells will also have **48 chromosomes**.

4. **Determining Chromosome Number in Eggs**:
- Eggs are produced in the flowers, which are part of the scion. The scion has 24 chromosomes.
- Eggs are haploid cells, meaning they contain half the number of chromosomes compared to the diploid number of the plant.
- Therefore, the number of chromosomes in the eggs will be half of 24, which is **12 chromosomes**.

5. **Final Answer**:
- The chromosome number for root cells is 48, and for eggs, it is 12.

### Conclusion:
- The final answer is that the chromosome numbers are **48 for root cells** and **12 for eggs**.