The brown allele is always dominant over the green and blue alleles, the green allele is always dominant over the blue allele, and the blue allele is always recessive. Because of this, it is possible for two brown-eyed parents to have a child with a different eye color than theirs.For two brown-eyed parents to have a blue-eyed child, for example, the mother and father would need to pass on a pair of blue alleles each to their offspring.he brown allele is always dominant over the green and blue alleles, the green allele is always dominant over the blue allele, and the blue allele is always recessive. Because of this, it is possible for two brown-eyed parents to have a child with a different eye color than theirs.
By Anne Marie Helmenstine, Ph.D. Micron Definition: A micron is a unit of length equivalent to a millionth of a meter. 1 micron = 1 Î¼m = 10 -6 m. Also Known As: micrometer, micrometre, Î¼m. Examples: Red blood cells are approximately 10 microns in diameter. Human hair is between 10 and 100 microns in diameter.
The term fine particles, or particulate matter 2.5 (PM 2.5), refers to tiny particles or droplets in the air that are two and one half microns or less in width. Like inches, meters and miles, a micron is a unit of measurement for distance.There are about 25,000 microns in an inch.The widths of the larger particles in the PM 2.5 size range would be about thirty times smaller than that of a human hair.ike inches, meters and miles, a micron is a unit of measurement for distance. There are about 25,000 microns in an inch. The widths of the larger particles in the PM 2.5 size range would be about thirty times smaller than that of a human hair.