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Dwarfism is a condition of people and animals marked by unusually small size or short stature. [1] In humans, it is sometimes defined as an adult height of less than 147 centimetres (4 ft 10 in), regardless of sex; the average adult height among people with dwarfism is 120 centimetres (4 ft).
Dwarfing is a process in which a breed of animals or cultivar of plants is changed to become significantly smaller than standard members of their species. The effect can be induced through human intervention or non-human processes, and can include genetic, nutritional or hormonal means.
Animals have been bred specifically to elicit chondrodystrophic traits for research purposes and to more easily allow animals to free-roam without escaping by, for example, jumping over ranch fences. One example of this is the Ancon sheep , which was first bred from a lamb born in 1791 with naturally occurring chondrodystrophy.
Achondroplasia is a genetic disorder with an autosomal dominant pattern of inheritance whose primary feature is dwarfism. [3] It is the most common cause of dwarfism [4] and affects about 1 in 27,500 people. [3] In those with the condition, the arms and legs are short, while the torso is typically of normal length. [3]
Dwarfism has the potential to be mistaken as congenital feline hypothyroidism. Signs such as disproportionate dwarfism, skeletal abnormalities, and mental disabilities point to both dwarfism and hypothyroidism. Because of this, proper testing can determine whether the cat is showing signs of hypothyroidism or if there is a deeper issue. [17]
The average life expectancy of all domestic cat breeds was 11.7 years. Crossbreeds and Siamese came very close to that mark at 11.9 and 11.7 years, respectively.
This is a list of maximum recorded animal lifespans in captivity. Only animals from the classes of the Chordata phylum are included. [1] On average, captive animals (especially mammals) live longer than wild animals.
Insular dwarfism, a form of phyletic dwarfism, [1] is the process and condition of large animals evolving or having a reduced body size [a] ...