👉 In genetics, heptaploidy refers to a genetic abnormality where two copies of an entire chromosome are present in each cell. This is caused by a mutation that results in a deletion or duplication of one or more chromosomes. Heptaploid cells can arise from a single somatic cell and can be found in both prokaryotic and eukaryotic organisms, including plants and animals. These heptaploids are often associated with developmental disorders due to their low genetic diversity