#Prota hair reviews skin

They determined that throughout the world, darker skin is much more dominant except in various parts of northern Europe. For example, they credit Gertrude and Charles Davenport as being the pioneers in the field of human pigmentation of the eye, hair and skin. The article begins by reviewing the basis behind human pigmentation. The authors, scientists at the School of Medicine at the University of Colorado in Denver, make some interesting assertions concerning the genetics behind skin color. “Human Pigmentation Genetics: The Difference is Only Skin Deep.” BioEssays. Finally, Rees examines the relationship between hair color and one’s nationality by looking at the different regions of the world.īox, Neil F., Michele Ramsay, and Richard A. He mentions that the absence of eumelanin or pheomelanin results in white hair. Rees also discusses the melanin in human hair which affects the color. This concept is vital because ultraviolet radiation tends to cause a reaction in human skin, leading to a tan or sunburn. Also, Rees states that Melanosomes passed to adjacent keratinocytes tend to produce caps over the nuclei, shielding the nuclear material from ultraviolet radiation. He adds that variation in skin pigmentation of both skin and hair, among people of different genetic ancestries is one of the most prominent features. The author, a scientist in the Department of Dermatology at the University of Edinburgh, begins by stating that the pigmentary phenotype of hair color is genetically complex. Rees, Jonathan L., “Genetics of Hair and Skin Color.” Annual Review of Genetics. Ultimately, Ortone and Prota concluded that hair pigmentation is under genetic control yet little is known about this control in humans.

Additionally, all human hair has a certain percentage of sulfur in it that is contained in the hair melanins. All in all, Ortone and Prota determined that whatever the color, all human hair contains various amounts of eumelanin and pheomelanin. They include the chemical structures which supports their findings. The melanosomes are what ultimately determine the color of the hair. This article is particularly helpful because it discusses various hair colors, and explains the different melanosomes for each color. They examine the different between follicular and epidermal melanin units. The authors, researchers at The Society for Investigative Dermatology, use data from various experiments they conducted with mice and guinea pigs to draw educated conclusions about hair and skin color amongst humans. “Hair Melanins and Hair Color: Ultrastructural and Biochemical Aspects.” Journal of Investigative Dermatology. The research I have conducted so far has been crucial in understanding why humans have a certain physical appearance based off of genetics. This process occurs in both hair and skin. Melanogenesis is the process in which these cells produce melanin. The pigments are produced by melanocytes, melanin producing cells that are located in the bottom layer of the epidermis. Basically, what it comes down to is the melanin in one’s hair and skin that determines the color.

Although some of the reading is hard to get through and understand, I have definitely learned some important facts about the genetics of hair and skin color. So far this week I have been researching and reading through articles to find ones that pertain to my genes.

Hair and skin color are two main traits that set people apart from one another and I am interested in learning about the genetics behind these fascinating traits. The main reason why I chose these two defining characteristics is because they are typically the first thing I notice about a person. The genes that I chose to focus on for this project are hair color and skin pigmentation.

Prota hair reviews