What does a tetraploid organism possess?

A tetraploid organism is characterized by having four complete sets of chromosomes, which is represented as 4n. In biological terms, the prefix "tetra-" means four, indicating that the organism has duplicated its complete set of chromosomes four times. This is important in various contexts, including plant biology, where many species exhibit polyploidy, often resulting in larger cell size or increased resilience and adaptability. The presence of multiple sets of chromosomes can also lead to genetic diversity and influence traits passed on to future generations. Therefore, the defining feature of a tetraploid organism is its four sets of chromosomes, affirming that the correct answer is 4n.