The following blanks can be filled only by numbers.
1. Gregor Mendel conducted hybridisation experiments on garden peas for (P) years .
2. Mendel selected (Q) true - breeding pea plant varieties.
3. In a human population , there are (R) alleles for ABO Blood group.
4. In Drosophila, genes for white eye and yellow body show (S) % recombination
The correct arrangement is

Options

A. `P lt Q lt R lt S`
B. `R lt P lt Q lt S`
C. `S lt R lt P lt Q`
D. `R lt S lt Q lt P`

Answer

To solve the question, we need to fill in the blanks with the correct numbers based on the information provided in the transcript. Let's break it down step by step:

### Step 1: Determine the number of years Mendel conducted his experiments.
- **Information**: Mendel conducted hybridization experiments on garden peas for 7 years.
- **Answer**: (P) = 7

### Step 2: Determine the number of true-breeding pea plant varieties Mendel selected.
- **Information**: Mendel selected 14 true-breeding varieties to observe 7 contrasting traits, with each trait having 2 distinct choices.
- **Answer**: (Q) = 14

### Step 3: Determine the number of alleles for the ABO blood group in humans.
- **Information**: There are 3 alleles for the ABO blood group: Ia, Ib, and i.
- **Answer**: (R) = 3

### Step 4: Determine the percentage of recombination for the genes in Drosophila.
- **Information**: The genes for white eye and yellow body in Drosophila show 1.3% recombination.
- **Answer**: (S) = 1.3

### Final Arrangement
Now we have the following numbers:
- (P) = 7
- (Q) = 14
- (R) = 3
- (S) = 1.3

To arrange them in ascending order:
1. (S) = 1.3
2. (R) = 3
3. (P) = 7
4. (Q) = 14

### Answer
The correct arrangement is:
- (S) = 1.3
- (R) = 3
- (P) = 7
- (Q) = 14

Thus, the final answer is (S, R, P, Q) = (1.3, 3, 7, 14).

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