Eye Color: The Most Common Colors
What are the Most Common Eye Colors?
When it comes to eye color, there are a variety of shades that can be seen. Some of the most common eye colors are brown, blue, gray, green, hazel, and amber. The most common eye color in the world is brown, which is seen in more than half of the population. Blue is the second most common eye color, followed by hazel and green.
What Causes Eye Color?
Eye color is determined by the amount of melanin in the iris of the eye. Melanin is a pigment that is produced by special cells, known as melanocytes. The amount of melanin in the iris determines the eye color, with more melanin producing darker eye colors, and less melanin producing lighter eye colors.
What is an Allele?
An allele is a variant form of a gene. Alleles are responsible for the different eye colors that we see in people. The allele that codes for brown eyes is dominant, and the alleles that code for blue, hazel, green, and amber eyes are recessive. The presence of a dominant allele will cause the phenotype to be expressed, while the presence of two recessive alleles will cause the phenotype to be expressed.
What is a Genotype?
A genotype is the genetic makeup of an individual. It is the combination of alleles that determine the eye color of an individual. A person's genotype can be either homozygous or heterozygous. Homozygous means that the individual has two identical alleles, while heterozygous means that the individual has two different alleles.
Conclusion
Eye color is determined by the amount of melanin in the iris of the eye and is influenced by genetic alleles. The most common eye color in the world is brown, followed by blue, hazel, and green. Knowing a person's genotype can help determine their eye color, as it is the combination of alleles that dictate the eye color.