Chromosome number in endosperm cell of plant 'x' and the gamete of plant 'y' are equal. Plants 'x' and 'y' respectively are

Options

A. Apple and rice
B. Maize and potato
C. Rice and onion
D. Onion and potato

Answer

To solve the question regarding the chromosome number in the endosperm cell of plant 'X' and the gamete of plant 'Y', we will analyze the options provided and determine which pair of plants has equal chromosome numbers.

### Step-by-Step Solution:

1. **Understand the Question**: We need to find two plants, where the chromosome number in the endosperm cell of plant 'X' is equal to the chromosome number in the gamete of plant 'Y'.

2. **Identify the Chromosome Numbers**:
- **Endosperm Cell**: This is typically triploid (3n) in plants.
- **Gamete**: This is haploid (n) in plants.

3. **Analyze Each Option**:
- **Option 1: Apple and Rice**
- Apple: Endosperm = 17 (3n)
- Rice: Gamete = 12 (n)
- Not equal, discard this option.

- **Option 2: Maize and Potato**
- Maize: Endosperm = 20 (3n)
- Potato: Gamete = 12 (n)
- Not equal, discard this option.

- **Option 3: Rice and Onion**
- Rice: Endosperm = 72 (3n)
- Onion: Gamete = 16 (n)
- Not equal, discard this option.

- **Option 4: Onion and Potato**
- Onion: Endosperm = 24 (3n)
- Potato: Gamete = 24 (n)
- Both are equal, this is a potential correct option.

4. **Conclusion**: The only pair where the chromosome numbers are equal is **Onion (plant X)** and **Potato (plant Y)**. Thus, the answer is:
- Plant X: Onion
- Plant Y: Potato

### Final Answer:
- Plant X: Onion
- Plant Y: Potato