Allergies. Allergies can cause a runny nose, sneezing, itching, or coughing. Food allergies are the most common in babies, but pets and insects can also cause an allergic reaction. Learn about baby allergies and how to ease them. 1  Facebook. 2  Pinterest.
But redheads as a group have more in common than only their hair color -- certain health conditions appear to be more common among people with red hair. Here are five health risks linked with being a redhead. About 1 to 2 percent of the human population has red hair.Redheads have genes to thank for their tresses. Research shows red hair usually results from a mutation in a gene called MC1R, which codes for the melanocortin-1 receptor. The pigment found in redhair that makes it red is called pheomelanin.ut redheads as a group have more in common than only their hair color -- certain health conditions appear to be more common among people with red hair. Here are five health risks linked with being a redhead. About 1 to 2 percent of the human population has red hair. Redheads have genes to thank for their tresses.
Many mutations have no effect at all. These are called silent mutations. But the mutations we hear about most often are the ones that cause disease. Some well-known inherited genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others.All of these disorders are caused by the mutation of a single gene.Most inherited genetic diseases are recessive, which means that a person must inherit two copies of the mutated gene to inherit a disorder.hese are called silent mutations. But the mutations we hear about most often are the ones that cause disease. Some well-known inherited genetic disorders include cystic fibrosis, sickle cell anemia, Tay-Sachs disease, phenylketonuria and color-blindness, among many others.