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.
Point mutations are the most common type of gene mutation. Also called a base-pair substitution, this type of mutation changes a single nucleotide base pair. Silent Mutation: Although a change in the DNA sequence occurs, this type of mutation does not change the protein that is to be produced. This is because multiple genetic codons can encode for the same amino acid. Amino acids are coded for by three nucleotide sets called codons.