How many chromosome sets do haploids have?

Haploids have one complete set of chromosomes, which is represented as 'n'. This means that in a haploid organism, each type of chromosome is present only once. For example, in humans, the haploid number of chromosomes is 23, which includes one chromosome from each pair found in diploid cells. This is essential for sexual reproduction, as haploid gametes (sperm and egg cells) combine during fertilization to form a diploid zygote, restoring the full set of chromosomes.

The other choices refer to polyploidy, which involves multiple sets of chromosomes. Diploids have two sets (2n), triploids have three sets (3n), and tetraploids have four sets (4n). Each of these terms describes organisms or cells where chromosome sets exceed one, differentiating them from haploids.