In alternation of generations the sporophyte generation is _________and the gametophyte generation is

Options

A. N, 2N
B. 2N, 2N
C. 2N, N
D. N, N

Answer

To answer the question regarding the alternation of generations in plants, we need to understand the definitions and characteristics of the sporophyte and gametophyte generations.

### Step-by-Step Solution:

1. **Understanding Alternation of Generations**:
- In the plant life cycle, there are two distinct phases: the sporophyte and the gametophyte. These two phases alternate with each other.

2. **Identifying the Sporophyte Generation**:
- The sporophyte generation is the diploid phase (2n). This means it has two sets of chromosomes. It develops from the zygote formed after the fertilization of gametes.

3. **Identifying the Gametophyte Generation**:
- The gametophyte generation is the haploid phase (n). This means it has one set of chromosomes. The gametophyte produces gametes (sperm and eggs) through mitosis.

4. **Process of Alternation**:
- The sporophyte produces spores through meiosis. These spores are haploid and will germinate to form the gametophyte.
- The gametophyte, in turn, produces gametes through mitosis. When these gametes fuse during fertilization, they form a diploid zygote, which develops into a new sporophyte.

5. **Final Answer**:
- Therefore, in alternation of generations, the sporophyte generation is **diploid** and the gametophyte generation is **haploid**.