👉 Polytypy, in biology and genetics, refers to the unique traits that are present in different populations of a species. These traits can be genetic or environmental, and they are not always present in all individuals from the same sex. For example, in humans, there are 23 pairs of chromosomes (X and Y), which make up two sexes: male (X) and female (Y). The presence or absence of any particular trait within a specific sex is determined by the combination of the
