Suppose an organism has 5 pg of DNA in nucleus of its egg. How much DNA would a diploid cell has in its nucleus at `G_(1)` ?

Options

A. 5 pg
B. 10 pg
C. 20 pg
D. 2.5 pg

Explanation

To solve the question, we need to understand the relationship between the DNA content in different types of cells and the cell cycle phases.

### Step-by-Step Solution:

1. **Identify the DNA Content in the Egg Cell**:
- The problem states that the organism has 5 picograms (pg) of DNA in the nucleus of its egg cell. This is a haploid cell (n), meaning it contains one set of chromosomes.

2. **Understand the Diploid Cell**:
- A diploid cell (2n) contains two sets of chromosomes. Therefore, it has twice the amount of DNA compared to a haploid cell.

3. **Calculate the DNA Content in the Diploid Cell**:
- Since the egg cell is haploid and contains 5 pg of DNA, the corresponding diploid cell will have:
\[ \text{DNA in diploid cell} = 2 \times \text{DNA in haploid cell} = 2 \times 5 \text{ pg} = 10 \text{ pg} \]

4. **Determine the DNA Content During G1 Phase**:
- During the G1 phase of the cell cycle, the diploid cell will still have the same amount of DNA as it does in its resting state, which is 10 pg.

### Final Answer:
The diploid cell will have **10 pg** of DNA in its nucleus at the G1 phase.

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