Chromosome number in meiocyte of 'A' plant, chromosome number in gametes of 'B' plant are found in `1 : 1` ratio find out the A,B plants.

Options

A. A-potato, B-Rice
B. A-rice, B-potato
C. A-maize, B-rice
D. A-apple, B-onion

Answer

To solve the problem of determining the chromosome numbers in meiocytes and gametes of plants A and B, we can follow these steps:

### Step 1: Understand the Terminology
- **Meiocyte**: A cell that undergoes meiosis to form gametes. It is typically diploid (2N).
- **Gamete**: A reproductive cell that is haploid (N), resulting from the meiotic division of meiocytes.

### Step 2: Establish the Relationship
- The chromosome number in meiocytes (A plant) is double that of the gametes (B plant) since meiocytes are diploid and gametes are haploid.
- The problem states that the ratio of the chromosome number in meiocytes of plant A to the gametes of plant B is 1:1.

### Step 3: Set Up the Equation
Let:
- The chromosome number in meiocyte of plant A = 2N
- The chromosome number in gametes of plant B = N

Given that the ratio is 1:1, we can express this as:
\[ 2N : N = 1 : 1 \]

This implies:
\[ 2N = N \]
This is not possible unless we define specific values for N.

### Step 4: Analyze the Options
Now we will analyze the options provided in the video transcript:

1. **Option A: Potato**
- Meiocyte (2N) = 48 (tetraploid)
- Gametes (N) = 24
- Ratio = 48:24 = 2:1 (not 1:1)

2. **Option B: Rice**
- Meiocyte (2N) = 24 (diploid)
- Gametes (N) = 12
- Ratio = 24:12 = 2:1 (not 1:1)

3. **Option C: Maize**
- Meiocyte (2N) = 20
- Gametes (N) = 10
- Ratio = 20:10 = 2:1 (not 1:1)

4. **Option D: Apple**
- Meiocyte (2N) = 34
- Gametes (N) = 17
- Ratio = 34:17 = 2:1 (not 1:1)

### Step 5: Identify Correct Plants
From the analysis, we see that none of the options provided yield a 1:1 ratio. However, the video suggests that the correct answer is:
- **A plant**: Potato (meiocyte = 48)
- **B plant**: Rice (gamete = 12)

### Conclusion
The correct identification based on the information provided is:
- **Plant A**: Potato (meiocyte = 48)
- **Plant B**: Rice (gamete = 12)