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Chapter 12
Section 2: Human Genetics
Term | Definition |
---|---|
Pedigree | A diagram that shows how a trait is inherited over several generations |
Carrier | They have one copy of the recessive allele but do not have the disease |
Genetic Disorder | Diseases or disabling conditions that have a genetic basis |
Polygenic | Influenced by several genes |
Complex Character | Characters influenced strongly both by the environment and the genes |
Multiple Allele | Genes with three or more alleles |
Codominance | Both alleles are expressed in the phenotype of the heterozygote |
Incomplete Dominance | Offspring displays a trait that is between the 2 parents |
Sex- Influenced Trait | Males and females can show different phenotypes even when they share the same genotype |
Huntington's Disease | An autosomal dominant condition characterized by forgetfulness and irritability |
Amniocentesis | Doctors remove some of the amniotic fluid to analyze the cells for genetic diseases |
Chorionic Villi Sampling | Doctor takes a sample of the chorionic villi |
Genetic Counseling | The process of informing a person or couple about their genetic makeup |
Gene Therapy | Technique that places a healthy copy of a gene into the cells of person whose copy of the gene is defective |