Medical-Surgical Nursing

Person who is heterozygous; possessing two different alleles of a gene pair

Microscopic structures in the cell nucleus that contain genetic information and are constant in number in a species

The primary genetic material in humans consisting of nitrogenous bases, a sugar group, and phosphate combined into a double helix

A genetic trait that is normally expressed when a person has a gene mutation on one of a pair of chromosomes and the normal form of the gene is on the other chromosome

The scientific study of heredity; how specific traits or predispositions are transmitted from parents to offspring

The total genetic complement of an individual genotype

The study of the human genome, including gene sequencing, mapping, and function

The genes and the variations therein that a person inherits from his or her parents

An international research effort aimed at identifying and characterizing the order of every base in the human genome

A heritable alteration in the genetic material

The failure of a chromosome pair to separate appropriately during meiosis, resulting in abnormal chromosome numbers in reproductive cells (gamates)

A diagrammatic representation of a family history

A person’s entire physical, biochemical, and physiologic makeup, as determined by the person’s genotype and environmental factors

Testing that is used to determine the likelihood that a healthy person with or without a family history of a condition will develop a disorder

Testing that is used to identify whether a fetus is at risk for a birth defect such as Down Syndrome or spina bifida

Genetic testing that is used to determine whether persons with a family history of a disorder, but nor current symptoms, have the gene mutation

A genetic trait that is expressed only when a person has two copies of a mutant autosomal gene or a single copy of a mutant X-linked gene in the absence of another X chromosome

Variation in the degree to which a trait is manifested; clinical severity

Located on the X chromosome