Ponies are an entirely different category, which is based on size. Horses have foals, which are categorized as colts, or male foals, and fillies, or â¦ female ones. A pony is classified as small, medium or large, depending on the height. A horse MAY produce a pony if there young only grow to pony size. Your horse has to reach 2 and a half years old to be sexually mature.
Ploidy is a term from genetics and cell biology. 1  It is used to indicate the number of chromosome sets in a cell. Most eukaryotes have either one set (called haploid) or two sets (called diploid). Some other organisms are polyploid, they have more than two sets of chromosomes. Some amphibians are triploid, with 3 sets.
See Article History. Polyploidy, the condition in which a normally diploid cell or organism acquires one or more additional sets of chromosomes. In other words, the polyploid cell or organism has three or more times the haploid chromosome number. Polyploidy arises as the result of total nondisjunction of chromosomes during mitosis or meiosis. Polyploidy is common among plants and has been, in fact, a major source of speciation in the angiosperms.