👉 Haplology is a genetic phenomenon in which certain chromosomes contain two copies of the same gene, while others do not. This means that each chromosome contains a copy of a unique gene, and the number of genes on each chromosome can vary. For example, in humans, both X and Y chromosomes have two copies of the human telomerase gene. The haplology of these genes allows for the expression of different genes at different stages of development, leading to various phenotypes.
