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Webbed feet are the result of mutations in genes that normally cause interdigital tissue between the toes to apoptose. [8] Apoptosis , or programmed cell death, in development is mediated by a variety of pathways, and normally causes the creation of digits by death of tissue separating the digits.
Webbed toes is the informal and common name for syndactyly affecting the feet—the fusion of two or more digits of the feet. This is normal in many birds, such as ducks; amphibians, such as frogs; and some mammals, such as kangaroos.
Five types [3] of syndactyly have been identified in humans. The corresponding loci associated with these types and their common phenotypical expression are as follows: . type I: 2q34-q36; [4] webbing occurs between middle and ring fingers and/or second and third toes.
An example of interdigital webbing on an Abah River flying frog.. In oryzomyines, a mainly South American rodent group, the marsh rice rat, Pseudoryzomys simplex, and Sigmodontomys alfari all have small webs, which do not extend to the end of the proximal phalanges, whereas Amphinectomys savamis, Lundomys molitor and the members of the genera Holochilus and Nectomys have more expansive webbing ...
The webbed or palmated feet of birds can be categorized into several types: Palmate : only the anterior digits (2–4) are joined by webbing. Found in ducks , geese and swans , gulls and terns , and other aquatic birds ( auks , flamingos , fulmars , jaegers , loons , petrels , shearwaters and skimmers ).
Police are asking for the public's help in identifying a mysterious woman found wandering by herself at 3 A.M. who claims to be a mermaid.
Tingling in your feet doesn’t necessarily mean you have a medical condition—it can sometimes happen from something as simple as sitting on your foot in a weird way, Dr. Danan says. But a few ...
Otters have long, slim bodies and relatively short limbs. Their most striking anatomical features are the powerful webbed feet used to swim, and their seal-like abilities for holding breath underwater. Most have sharp claws on their feet and all except the sea otter have long, muscular tails.