Skin color in humans, many genes determine the skin color and offspring is expected to express an intermediate phenotype…
* Dark skin is due to genes that cause large amounts of melanin to be produced; lighter skin is due to genes that cause lesser amount of melanin to form…
genetics plays in skin cancer. Yes there are certain genetic mutations that are inherited, or…
We shall assume that three genes control the synthesis of melanin. Each gene has two forms: an allele for high melanin production, or dark skin (A,B,C), and an allele for low melanin production, or light skin…
Skin cancer is a disease that affects millions of people every year. While most forms of this cancer are caused by environmental factors, there are some forms that are caused by mutations in our genes that we have inherently developed. Those who are from a family that has been diagnosed with melanoma are up to three times more likely to develop the cancer in their lifetime. There are a few genes that are responsible for the development of melanoma and in this paper I will seek to explore the causes and factors involved in melanoma as well as our varying pigmentation.…
House on Mango Street response After finishing House on Mango Street by Sandra Cisneros which is a “coming of age story” genre. Point of the author was to express everyone's hopes and dreams. In the reading Esperanza shares her stories throughout the vignettes, she expresses her opinion toward a certain topic and also talks about stories of the people she meets in the neighborhood, furthermore talks about her dream house that she wants to have in the future The vignettes included mostly opinions on a certain topic or told a story of someone who Esperanza meet. Esperanza tries to express herself on a lot of topics but the most important vignette that I showed most emotion was on page 99-100, in that vignette Esperanza expresses her anger…
Melanin is the pigment in the skin that absorbs ultraviolet light and protects the skin from sun damage, so the less pigment in a person’s skin the less protection they have from ultraviolet light. So light skinned people (Caucasians), particularly those with light coloured eyes and light coloured hair are more susceptible to sun damage and skin cancer than people with more pigment in their skin. People, who have no melanin at all, like people with albinism or vitiligo, are much more susceptible to skin cancer.…
Other kinds of genes create differences among people. Children’s eye color, and facial appearance are largely determined by genes.…
The amount of melanin in an African American woman’s skin has the power to determine her life outcomes. The color of the black woman’s skin directly and indirectly influences educational achievement, social class and familial outcomes. For example, light skinned black women are more likely to earn more income than dark skinned black women, even when they have the same qualifications (Hunter, 2002, p.188). Additionally, [include one more example].…
There are several factors that contribute to the cause of BCC. These factors include, light colored skin, light colored eyes, blonde or red hair, overexposure to x-rays or radiation, many moles, genetics, many severe sunburns early in life, and long term daily sun exposure (Medline Plus, 2012). Individuals with light colored skin, hair, and eyes have poor tanning abilities and are more likely to have sun-damaged skin (Roewart-Hober, 2007). Radiation therapy in childhood for ringworm on a 58 year old patient caused an aggressively growing BCC that took over most of the posterior scalp (Asilian, 2005). Genetics also contribute to your likelihood of getting a BCC. A family history of skin cancer can increase your chances of having a BCC (Skelton, 2009). Also, there is several inherited and acquired skin disorders associated with BCC. These disorders include xeroderma pigmentosum, nevoid basal cell syndrome, Bazex-syndrome, Rasmussen syndrome, Rombo syndrome, and albinism (Roewert-Hober, 2007). Although there are several contributing factors to BCC, the number one cause is sun exposure and other ultraviolet…
Moalem suggests that all humans had pale skin with dark hair all over to protect ourselves from too much sunlight. However, as the human evolved and lost a significant amount body hair, the skin, the largest organ of the body, would become exposed to the strong ultraviolet rays of the sun. Ultraviolet B, a specific type of ultraviolet light, is beneficial as it effectively converts our cholesterol into Vitamin D, which the body cannot simply live without. However, too much sunlight exposure and harmful effects quickly outnumber the beneficial ones, ranging from sunburn to skin cancer and the decrease of our body's folic acid. Thus, humans, especially those near the equator, developed a darker skin tone with the pigment melanin. While the color of the dark skin absorbs more heat and light, the melanin in the skin prevents too much of the harmful rays from penetrating the skin, protecting folic acid. However, "[dark skin] didn't evolve with a switch -- you can't turn it off when you need to whip up a batch of vitamin D." That is where the genetic mutation apolipoprotein E, or ApoE4 for short, came in. "[ApoE4] ensures that the amount of cholesterol flowing through your blood is cranked up. With more cholesterol available for conversion, dark-skinned people can maximize the use of whatever sunlight penetrates their skin." The fair-skinned Europeans of the time…
The beginning of this rare disease was from a mutation of rhodopsin a pigment that is essential in visual transduction and was first recorded in 1989 and since then more than 100 mutations have been found from that gene (wiki RP Genetics). The disease currently has multiple symptoms which include; night blindness tunnel vision (no peripheral), peripheral vision (no central), Latticework vision, aversion to glare, slow adjustment from dark to light and vice versa, blurred vision, poor color separation, and extreme tiredness (RP symptoms). In order to get as a most common cause is both parents have the recessive gene which mainly came from a European heritage. The only way to know if you have the dominant gene is after puberty which shows many of the early symptoms such as night blindness. As time moves along the possibility in degeneration of vision varies and is sometimes unpredictable but sudden blindness is not likely.…
For example driving, there are thousands of studied that show driving is a huge risk for people who have color deficiencies. The ability to read signs and light are important while driving. An example of a hazard is, for some people red traffic lights may appear to be dull or not there, which means they may not stop when directed. There are also a lot of jobs that require normal color vision, such as police officer, firefighter, and airline pilot. It even makes it hard for some to do simple things like coloring and painting. Some have even admitted to not being too fond or familiar with the rainbow. While this disorder is not deadly it sure is ashame that some miss out on the wonderful world of colors and all of its…
The idea of this experiment is to give a clearer understanding between autosomal, sex-linked, recessive and dominant genes. Furthermore, with this knowledge we can then understand how a gene is passed down through its generations and why it would appear in one individual and not in another. The experiment also helps give a better understanding of genotypes and phenotypes and what role they play in determining and predicting a genotype.…
At age eleven, I remember my doctor announcing that I had B thalassemia trait minor and I was a carrier. It did not strike me as hard as it did when I found out that a friend’s aunt has recently passed away from being defeated by B Thalassemia Major. In the years to come, I understood that the only way I could make sure I had happy healthy children, was to dive into genetic counseling with whoever was to become my husband. When the time came I was over joyed to find out that my spouse was not a carrier and went on to having two amazing boys. One who is also a carrier of B Thalassemia Trait. The disorder that causes me mild anemia was passed from my paternal grandmother, to my father, to me and my youngest son. I am fortunate and very grateful for the diagnosis at age eleven. I now can ensure that youngest son will go on to raising his very own happy healthy children.…