If the filiform apparatus has 28 chromosomes , then what will be their number in the nucellus and funicle of the cell , respectively ?

Options

A. 56 , 28
B. 28 , 56
C. 56 ,56
D. 84 , 56

Answer

To solve the problem, we need to understand the relationship between the number of chromosomes in different parts of the plant reproductive structure.

### Step-by-Step Solution:

1. **Identify the Ploidy of the Filiform Apparatus**:
- The question states that the filiform apparatus has 28 chromosomes. The filiform apparatus is part of the embryo sac and is haploid (n). Therefore, the number of chromosomes in the filiform apparatus is 28, which means it represents one set of chromosomes.

2. **Determine the Ploidy of the Nucellus and Funicle**:
- The nucellus and funicle are part of the ovule structure. Both of these structures are diploid (2n). In plants, the diploid cells contain two sets of chromosomes.

3. **Calculate the Number of Chromosomes in Nucellus and Funicle**:
- Since the filiform apparatus is haploid with 28 chromosomes, the diploid structures (nucellus and funicle) will have double that number.
- Therefore, the number of chromosomes in the nucellus = 2 * 28 = 56 chromosomes.
- Similarly, the number of chromosomes in the funicle = 2 * 28 = 56 chromosomes.

4. **Final Answer**:
- Thus, the number of chromosomes in the nucellus and funicle is 56 and 56, respectively.

### Conclusion:
The answer to the question is that both the nucellus and the funicle have 56 chromosomes each.