If a stock has 2n=48 and scion microspore mother cell has 2n=24, then root cell and the microspores will have. . . . Chromosomes respectively

Options

A. 12,48
B. 48,12
C. 24,12
D. 24,96

Explanation

To solve the problem, we need to determine the number of chromosomes in the root cells and microspores based on the information provided.

### Step-by-Step Solution:

1. **Understanding the Chromosome Number in the Stalk**:
- The question states that the stalk has a chromosome number of 2n = 48.
- This means that the stalk is diploid (2n) with 48 chromosomes.

2. **Determining the Chromosome Number in Root Cells**:
- The root cells develop from the stalk through the process of mitosis.
- Mitosis maintains the chromosome number, so the root cells will also have the same diploid number as the stalk.
- Therefore, the number of chromosomes in the root cells is 2n = 48.

3. **Understanding the Chromosome Number in the Microspore Mother Cell**:
- The microspore mother cell has a chromosome number of 2n = 24.
- This indicates that the microspore mother cell is also diploid with 24 chromosomes.

4. **Determining the Chromosome Number in Microspores**:
- The microspore mother cell undergoes meiosis to produce microspores.
- Meiosis reduces the chromosome number by half, resulting in haploid cells.
- Therefore, the number of chromosomes in the microspores will be n = 12 (half of 24).

5. **Final Answer**:
- The root cells will have 48 chromosomes (2n = 48).
- The microspores will have 12 chromosomes (n = 12).

### Summary:
- Root cells: 48 chromosomes (2n = 48)
- Microspores: 12 chromosomes (n = 12)