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 question regarding the number of chromosomes in the nucellus and funicle of the cell given that the filiform apparatus has 28 chromosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome Number in Filiform Apparatus**:
- The filiform apparatus is part of the female gametophyte in flowering plants and is involved in the fertilization process. It is haploid, meaning it contains a single set of chromosomes.
- Given that the filiform apparatus has 28 chromosomes, this indicates that it is haploid (n = 28).

2. **Determining the Chromosome Number in Nucellus**:
- The nucellus is part of the ovule and is diploid in nature. This means it contains two sets of chromosomes (2n).
- Since the haploid number (n) is 28, the diploid number (2n) for the nucellus would be:
\[ 2n = 2 \times 28 = 56 \]

3. **Determining the Chromosome Number in Funicle**:
- The funicle, which connects the ovule to the ovary wall, is also diploid (2n).
- Therefore, similar to the nucellus, the chromosome number in the funicle is also:
\[ 2n = 2 \times 28 = 56 \]

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

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