Eye Color; Myths of Genetics

There are many myths regarding genetics and inheritable traits. Even when most of them have been clarified, people are still confused about some patterns of heredity. One of the most popular myths of genetics is eye color, specially those in the blue category since it is less common.
People used to believe that eye color were single genes, and that blue is a recessive allele of other non-blue eye colors like greens and browns. A research on myths of human genetics by John McDonald notes that eye color is not a simple hereditary trait, in fact there is at least 12 genes involved and phenotypes vary not only with the genes themselves but also with the interactions with each other.

Heterochromia: Different pigmentation/concentration of melanin.

Many articles explain that the coloration of the eyes is mainly based on the presence and absence of melanin, and that essentially there is only one eye color, brown; other colors are a product of reflection and absorption of light. Melanin is a brown pigment that absorbs light; in blue eyes, there is less melanin thus more light is reflected. For eye color, there are genes that determine the melanin's quality, quantity, dispersion, concentration, etc. Other factors like the amount of collagen in the iris and blood vessels can also affect the color expressed. Eye color is still believed to be genetic but is more complicated than simple dominant-recessive alleles.

Vitamin C Myth?

                                                                                     In the article, What does Vitamin C Really Do?,

it is explained how Linus Pauling, the father of molecular biology, created a myth about vitamin C. The myth is that vitamin C prevents colds, cancers, and cures either aliment. In this article, it is stated, “Some studies have found evidence that regular usage might shorten the duration of your cold, but not when taken after the onset of the cold. Others have found associations with daily dosage and lower risk of cardiovascular diseases, though still have shown no relationship whatsoever.” Vitamin C is water-soluble so it will exit the body by peeing. According to this article, taking vitamin C supplements will have no effect on our bodies health because it is water-soluble. Personally, I do not fully agree with this statement. I think that even though vitamin C is water-soluble, taking it, by eating foods such as bananas, apples, and onions, will help an individual create collagen and heal wounds by repairing tissues. This is an example how vitamin C effects our bodies. But, I do agree with the myth that vitamin C does not prevent colds and cancers. If vitamin C prevented colds, then many people would not catch colds and if it prevented cancer, many people would not get the terrible news from the doctor that they have cancer. I believe that it can shorten the time of a cold. Personally, I take multi-vitamins every morning because I do not get all the vitamins I need, from the food that I eat. From these multi-vitamins, I do intake vitamin C daily. Even though I am taking these, I know vitamin C does not prevent colds or cancer.   

http://www.health.com/cold-flu-sinus/5-myths-and-facts-about-vitamin-c

http://www.popsci.com/vitamin-c#page-3