Skip Navigation
About   Site Map   Contact Us
 
A service of the U.S. National Library of Medicine®
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q-R | S | T | U | V | W | X-Y | Z

Recessive

Definition(s)

A gene which will be expressed only if there are 2 identical copies or, for a male, if one copy is present on the X chromosome.

Definition from: Human Genome Project InformationThis link leads to a site outside Genetics Home Reference. at the U.S. Department of Energy

A genetic disorder that appears only in patients who have received two copies of a mutant gene, one from each parent.

Definition from: Talking Glossary of Genetic TermsThis link leads to a site outside Genetics Home Reference. from the National Human Genome Research Institute

A gene that is phenotypically manifest in the homozygous state but is masked in the presence of a dominant allele.

Definition from: Office of Rare DiseasesThis link leads to a site outside Genetics Home Reference. at the National Institutes of Health

Related discussion in the Handbook

 
Published: January 23, 2009