Question

what is neoteny? In which group of vertebrate does this phenomena occur?

Answer 1

Neoteny is found in modern humans. In progenesis (also called paedogenesis), sexual development is accelerated. Both neoteny and progenesis result in paedomorphism (or paedomorphosis), a type of heterochrony. ... Such retention is important in evolutionary biology, domestication and evolutionary developmental biology.

Answer 2

Explanation:

• Neoteny is a condition in which somatic cell or physical maturation is delayed or prolonged while the germ cell or reproductive system maturation continues at a constant pace.
• Therefore, such organisms attain sexual maturity in their larval stage itself.
• They do not undergo metamorphosis.
• This condition usually occurs due to the abnormal production of thyroid hormones and low secretion of Thyroid-stimulating hormone(TSH).  
• Neoteny is frequently observed in amphibians, especially in the order of Urodela (Newts and Salamanders). Axolotl larva of Ambystoma is an example of neoteny.

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