Alleelinen

Alleelinen is a term used in genetics to describe the relationship between different versions of a gene, known as alleles. Alleles are variants of a gene that occur at the same locus on homologous chromosomes. They can be further categorized into two main types: dominant and recessive. Dominant alleles are expressed in the phenotype when present, even if only one copy is inherited. Recessive alleles, on the other hand, are only expressed when two copies are present, as they are masked by the dominant allele when only one copy is inherited. The study of allelic variation is crucial in understanding genetic diversity, inheritance patterns, and the basis of genetic disorders. Alleles can also influence traits such as blood type, eye color, and susceptibility to certain diseases. The concept of allelic variation is fundamental to fields like evolutionary biology, population genetics, and medical genetics.