trisomic Applied to a genome that is diploid but which contains an extra chromosome, homologous with one of the existing pairs, so that one kind of chromosome is present in triplicate. The chromosome number is thus of the form 2n + 1. Trisomies give multiple doses of genes and may have deleterious effects, as in the human condition of Down's syndrome, which results from a trisomy of chromosome 21.
More From encyclopedia.com
Allele , allele The common shortening of the term ‘allelomorph’. One of two or more forms of a gene arising by mutation and occupying the same relative positi… Multiple Alleles , Alleles are alternative forms of a gene, and they are responsible for differences in phenotypic expression of a given trait (e.g., brown eyes versus… Genetics , genetics, scientific study of the mechanism of heredity. While Gregor Mendel first presented his findings on the statistical laws governing the trans… Nomenclature , Like any other field in science, genetics has its own language. However, genetics is also a multidisciplinary field that encompasses expertise, and h… Pseudogenes , Pseudogenes are defective copies of functional genes. These may be partial or complete duplicates derived from polypeptide-encoding genes or RNA gene… Eukaryotic Chromosome , Chromosome, Eukaryotic Living organisms are divided into two broad categories based upon certain attributes of cell structure. The first category, th…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like