Which of the following is a case of auto-alloploidy?

Options

A. AA,AA,AA
B. AA,AA,BB
C. AA-1
D. `1xx10^(-12)`

Answer

To determine which of the following is a case of auto-alloploidy, we need to understand the concepts of autopolyploidy and allopolyploidy.

### Step-by-Step Solution:

1. **Define Autopolyploidy and Allopolyploidy**:
- **Autopolyploidy** refers to the condition where an organism has more than two sets of chromosomes, all derived from a single species. This occurs due to the duplication of its own genome.
- **Allopolyploidy** involves the combination of chromosome sets from different species, resulting in a hybrid organism with multiple sets of chromosomes.

2. **Understanding Auto-Alloploidy**:
- The term "auto-alloploidy" is somewhat contradictory, as it combines aspects of both autopolyploidy and allopolyploidy. However, it can refer to a situation where an organism has undergone both processes, typically involving the duplication of its own genome and the incorporation of chromosomes from another species.

3. **Analyzing the Options**:
- The options provided are:
- Option 1: AA
- Option 2: AA, AA, AA, AA, AA, BB
- Option 3: AA-1
- Option 4: 1x10^-12
- From the definitions, we can analyze which option represents a case of auto-alloploidy.

4. **Identifying the Correct Option**:
- Option 1 (AA) represents a single species and does not indicate any duplication or contribution from another species.
- Option 2 (AA, AA, AA, AA, AA, BB) indicates the presence of two different sets of chromosomes (A and B), suggesting a combination of genomes from two species, which aligns with the concept of allopolyploidy.
- Option 3 (AA-1) does not provide enough information to determine if it represents a case of auto-alloploidy.
- Option 4 (1x10^-12) does not represent a chromosomal configuration.

5. **Conclusion**:
- The correct answer is **Option 2: AA, AA, AA, AA, AA, BB**, as it represents a case of auto-alloploidy by indicating the presence of duplicated sets of chromosomes from two different species.