Refer the given statements and select the correct option
(i) Percentage of homozygous dominant individuals obtained by selfing Aa individuals is 25 %
(ii) Types of genetically different gametes produce by genotype AABbcc are 2
(iii) Phenotypic ratio of monohybrid `F_(2)` progeny in case of Mirabilis jalapa is `3 :1`

Options

A. All the statements are true
B. Statements (i) and (ii) are true, but statement (iii) is false
C. Statement (i) and (iii) are true, but statement (ii) is false
D. Statements (ii) and (iii) are true, but statement (i) is false

Explanation

To solve the question, we will analyze each statement one by one and determine whether they are true or false.

### Step 1: Analyze Statement (i)
**Statement (i)**: Percentage of homozygous dominant individuals obtained by selfing Aa individuals is 25%.

- **Selfing Aa individuals** means crossing two heterozygous individuals (Aa x Aa).
- The possible gametes produced by each Aa individual are A and a.
- The Punnett square for this cross is:

```
A a
------------
A | AA | Aa |
------------
a | Aa | aa |
```

- The genotypes produced are:
- AA (homozygous dominant) - 1
- Aa (heterozygous) - 2
- aa (homozygous recessive) - 1

- The total combinations are 4 (1 AA + 2 Aa + 1 aa).
- The percentage of homozygous dominant (AA) individuals is 1 out of 4, which is 25%.

**Conclusion**: This statement is **True**.

### Step 2: Analyze Statement (ii)
**Statement (ii)**: Types of genetically different gametes produced by genotype AABbcc are 2.

- The genotype AABbcc can produce gametes based on the alleles present.
- For AABbcc:
- The A allele is homozygous (AA), so it can only produce one type of gamete: A.
- The B allele is homozygous (BB), so it can only produce one type of gamete: B.
- The C allele is heterozygous (Cc), so it can produce two types of gametes: C and c.

- Therefore, the possible gametes are:
- ABc
- ABc (from C)
- ABc (from c)

- The unique combinations of gametes are:
- ABC
- ABc

- Thus, the total types of genetically different gametes produced are 2.

**Conclusion**: This statement is **True**.

### Step 3: Analyze Statement (iii)
**Statement (iii)**: Phenotypic ratio of monohybrid F2 progeny in case of Mirabilis jalapa is 3:1.

- In a typical monohybrid cross, the expected phenotypic ratio for the F2 generation is indeed 3:1 when one trait is dominant over another.
- However, Mirabilis jalapa (also known as the four o'clock plant) exhibits incomplete dominance, resulting in a phenotypic ratio of 1:2:1 in the F2 generation.

**Conclusion**: This statement is **False**.

### Final Conclusion:
- Statement (i) is True.
- Statement (ii) is True.
- Statement (iii) is False.

Thus, the correct option is that statements one and two are true, while statement three is false.

### Final Answer:
**Option B: Statement 1 and 2 are correct while statement 3 is false.**

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