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Biology Chapter 12.2

Pedigree A diagram that shows the occurrence of a genetic trait in several generations of a family
Carrier In genetics, an individual who has one copy of a recessive autosomal allele that causes disease in the homozygous condition.
Genetic Disorder An inherited disease or disorder that is caused by a mutation in a gene or by a chromosomal defect.
Polygenic Describes a characteristic that is influenced by many genes.
Complex Character A character such as skin color that is influenced strongly by both genes in the environment.
Multiple Allele More than two alleles for a genetic trait.
Codominance A condition in which both alleles for a gene are fully expressed.
Incomplete Dominance A condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully.
Sex-influenced Trait A trait that is determined by a gene found on one of the sex chromosomes, such as the X chromosome or the Y chromosome in humans.
Huntington's Disease A rare hereditary disease of the brain characterized by involuntary movements of the limbs or face, decreasing mental abilities, and eventual death.
Amniocentesis The formation of ammonia compounds in the soil by the action of bacteria on decaying matter.
Chorionic Villi Sampling A procedure in which the chorionic villi to are analyzed to diagnose fetal genotypes.
Genetic Counseling The process of testing and informing potential parents about their genetic makeup and the likelihood that they will have offspring with genetic defects or hereditary diseases.
Gene Therapy A technique that places a gene into a cell to correct a hereditary disease or to improve the genome.
Created by: DragonT20