👉 The term "leptosomic" refers to a condition in which an individual has two sets of chromosomes, one from each parent. This can occur when both parents are carriers of the same genetic mutation, known as a "carrier's twin," and they have no children. In this case, one set of chromosomes is from the mother, while the other is from the father. The carrier's twin would be carrying two copies of their own genetic mutations, which makes them a leptosomic