👉 In evolutionary biology, a haploid organism is an organism that has only one set of chromosomes. This means that all its genes are on the same chromosome and every gene can be expressed in different ways. In other words, there is no copy of each gene in each cell. For example, a diploid organism (which has two sets of chromosomes) contains two copies of each gene. Haploids are important for understanding the evolutionary history of organisms because they provide insights into how genetic variation arises
