recessiivisyyttä

Recessivity refers to the genetic trait of a particular allele being expressed only when present in a homozygous state, meaning two copies of the allele are inherited, one from each parent. This is in contrast to dominant traits, which can be expressed even if only one copy of the allele is present. Recessive traits are often masked by the presence of a dominant allele, which is why they may not be apparent in individuals who carry only one copy of the recessive allele. For example, the allele for blue eyes is recessive, and an individual with one blue-eyed allele and one brown-eyed allele will have brown eyes. However, if both alleles are blue-eyed, the individual will have blue eyes. Recessivity is a fundamental concept in genetics, helping to explain the inheritance of various traits and genetic disorders. It is important to note that the expression of a recessive trait can also be influenced by environmental factors and other genetic interactions.