Hairlessness

Peruvian Hairless Dog - Genetics and Health
... The genes that cause hairlessness also result in the breed often having fewer teeth than other breeds, mostly lacking molars and premolars ... One theory is that the hairlessness trait is recessive-lethal, which means that homozygotic hairlessness doesn't exist ...

Evolution Of Hair - Evolution - Human Hairlessness
... The hairlessness of humans compared to related species may be due to loss of functionality in the pseudogene KRTHAP1 (which helps produce keratin) in the human lineage about 240,000 years ago ... Historically, some ideas have been advanced to explain the apparent hairlessness of humans, as compared to other species ... Several hypotheses explained hairlessness as a thermoregulatory adaptation to hot and dry savanna ...

Evolution - Human Hairlessness
... The hairlessness of humans compared to related species may be due to loss of functionality in the pseudogene KRTHAP1 (which helps produce keratin) in ... Historically, some ideas have been advanced to explain the apparent hairlessness of humans, as compared to other species ... Several hypotheses explained hairlessness as a thermoregulartoy adaptation to hot and dry savanna ...

Aquatic Ape Hypothesis - The Hypothesis - Specific Claims
... Hairlessness ... Hairlessness is only an advantage for aquatic mammals such as whales and dolphins that have spent millions of years adapting to aquatic lifestyles involving diving, fast swimming and ... Though a variety of explanations have been proposed for human hairlessness, the best-supported theory involves improved cooling through perspiration while fur helps cool inactive ...