Human Evolution: The Evolution Of Human Body Forms

1278 Words 5 Pages
Human evolution is the time by which humans change overtime. Humans develop characteristics and traits that enhance their abilities and chances for survival. Physical and behavior traits have been shown to have some relations with the common ancestors of apes. While human evolution occurs it coexists with the study of population genetics. Population genetics occurs when frequencies in alleles between populations are distributed. Plenty of researchers have used these two ideas to study how accurate past researchers were in their studies. Humans tend to have genetic similarities in physical and genetic traits, especially in families. Natural selection played a key role in the development of cavemen thousands of years ago to the modern day human. …show more content…
Roseman and Benjamin M. Auerbach wrote an extremely interesting journal based off the evolution of human body forms. Writers Jonathan L. Rees and Rosalind M. Harding wrote an article based off a similar idea about humans, only this time it is about the pigmentation of human. Variation in human skin and hair color is one of the most striking aspects of human variability; and explaining this diversity is one of the central questions of human biology (Rees and Harding, p.846, 2012). If you think about all every human in the world, you will see that they all vary in many aspects. If this specific instances, people may have blonde hair and blues and some have black hair and brown eyes. These variations occurred through the process of evolution. The main point that Rees and Harding is trying to make in their study is to review the works of other researches on the concept of human populations and their genetics and how our knowledge of evolution is affected by that (Rees and Harding, p.846, …show more content…
MC1R was the first gene that was acknowledged to distinguish normal variations in pigmented characteristics in humans. Researchers discovered that this gene was extremely polymorphic in the Northern European populations, while many loss-of-function or diminished-functioned alleles were present at high frequencies. In this case, majority of the people with red hair were heterozygotes for two of these specific kinds of alleles. They were able to distinguish other effects that single alleles had on people with freckles, scalp hair color, beard color and skin color. Though the studies that Rees and Harding observed looked at other characteristics that displayed diminished-function alleles in homozygotes, and these homozygotes were known to have lower amounts of pheomelanin and eumelanin, which are the types of melanin that displays specific colors of skin or hard (p.

Related Documents