Gigantism is is mostly found in

Options

A. Autopolyploids
B. Allopolyploids
C. Haploids
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Gigantism**: Gigantism refers to the condition where an organism is significantly larger than others of its species. This can occur due to various genetic and environmental factors.

2. **Identifying Ploidy Levels**: In biological terms, "ploidy" refers to the number of sets of chromosomes in a cell. The most common ploidy levels are haploid (1N), diploid (2N), and polyploid (more than 2N).

3. **Analyzing Organisms**: Most higher organisms, including both plants and animals, are diploid in their somatic (body) cells. This means they have two sets of chromosomes, one from each parent.

4. **Exploring Polyploidy**: Polyploidy is a condition where an organism has more than two sets of chromosomes. There are two types of polyploidy:
- **Autopolyploidy**: This occurs when an organism has multiple sets of chromosomes derived from the same species.
- **Allopolyploidy**: This occurs when an organism has sets of chromosomes from different species, typically resulting from hybridization.

5. **Linking Polyploidy to Gigantism**: Research indicates that autopolyploids are more likely to exhibit gigantism. This is because having multiple sets of chromosomes can lead to increased genetic variation and expression of beneficial traits, including size.

6. **Evaluating the Options**:
- **Haploids**: Generally do not exhibit gigantism as they have only one set of chromosomes.
- **Diploids**: While they can be large, they are not typically associated with the extreme size seen in gigantism.
- **Autopolyploids**: These organisms often show increased size and vigor due to their multiple sets of chromosomes.
- **Allopolyploids**: These are hybrids and do not typically represent a single species, making them less likely to exhibit gigantism.

7. **Conclusion**: The organism most likely to exhibit gigantism is the autopolyploid, as they have more than two sets of chromosomes from the same species, leading to increased size and genetic diversity.

**Final Answer**: Gigantism is mostly found in **autopolyploid organisms**.

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