As in this example, non-existent and non-existent living things “forbidden phenotype” it is called. The phenotype (external structure) is the reflection of the characteristics created by genetic and environmental factors in the appearance of living things. It is usually determined by genes.

In the absence of living beings with this property, The most important factor is genes. Here are the details of this turning point that shaped us as if we were toy dough in the evolutionary process:

Although they do not have three-legged animals, some animals can use their tail and fins as third legs.

Meerkats that receive support from their tails to stand upright, woodpeckers that use their tail feathers to balance on the tree trunk, kangaroos that use their tails as legs to use less energy when walking, and tripod fish that use their three fins to to walk”. on the ocean floor are among the prominent examples.

The legs of six-legged insects move in a team of three. Half of the legs are in the air and the other half on the ground. This is called a “wobbly three-legged” gait.

Despite the fact that some creatures seem to need three legs, why did such a creature never come into existence?

The reason for this goes back a very long time. Phylogenetics is the strongest constraint for evolution. This concept is the evolutionary development of biological species through various forms, and these relationships are called phylogeny. The related concept, phylogeny, is the definition of a biological species. through various forms evolutionary development. The term is also used for the development of a particular characteristic of an organism. The adjectival form of this term is phylogenetic.

which occurs before the appearance of the limbs a bilaterally symmetrical body plan early genetically adopted. This greatly limits the evolution of any three-legged animal. This is how our codes are, ingrained in our DNA very early in the evolution of life. It may even have occurred before limbs such as legs, fins, and wings developed.

It is possible to encounter three-legged creatures through amputees and mutations.

amputee quadrupeds or mutations and birth defects Because of this, creatures with three or five legs can be seen. As long as appropriate treatments are given, these creatures can continue their lives normally.

While the idea of ​​three or five animals may sound strange, it is often used in science fiction works.

Who knows, maybe creatures with three or five legs somewhere in the universe evolved, and they think how difficult it can be to walk on two legs.

Sources: 1, 2, 3, 4, 5