Domináns

Domináns refers to a dominant allele in genetics. An allele is a variant form of a gene. When an organism has two alleles for a particular gene, and one allele is dominant, it means that the trait expressed by the dominant allele will be observed, even if the other allele (the recessive allele) is also present. The dominant allele effectively masks the effect of the recessive allele. For a dominant trait to be expressed, only one copy of the dominant allele is needed. This is in contrast to recessive traits, which require two copies of the recessive allele to be expressed. For example, in pea plants, the allele for tallness is dominant over the allele for shortness. Therefore, a pea plant with one allele for tallness and one for shortness will be tall. The gene and its different alleles are located at a specific position on a chromosome, known as a locus. The combination of alleles an individual has for a particular gene is called their genotype. The observable physical or biochemical characteristics of an organism, determined by its genotype and environmental influences, are known as its phenotype. In the case of a dominant allele, the phenotype will reflect the trait associated with that allele if at least one copy is present in the genotype. Understanding dominant and recessive alleles is fundamental to basic Mendelian inheritance patterns.