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Biology Ch. 12.2

TermDefinition
pedigree A diagram that shows the occurrence of a genetic trait in several generations of a family
carrier In biology, 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 A characteristic of an organism that is determined by many genes
complex character A character such as skin color that is influenced strongly by both genes and the environment
multiple allele More than two alleles (versions of the gene) 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 An autosomal trait that is influenced by the presence of male or female sex hormones
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 A procedure used in fetal diagnosis in which amniotic fluid is removed from the uterus of the pregnant woman
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: HuffmanV20
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