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Bio Chapter 7
Term | Definition |
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Carrier | In biology, an individual who has one copy of a recessive autosomal allele that causes disease in the homozygous condition |
Sex-linked gene | Gene that is located on a sex chromosome |
X chromosome inactivation | Process that occurs in female mammals in which one of the X chromosomes is randomly turned off in each cell |
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 |
Codominance | A condition in which both alleles for a gene are fully expressed |
Polygenic trait | Trait that is produced by two or more genes |
Linkage map | Diagram that shows the relative locations of genes on a chromosome |
Pedigree | A diagram that shows the occurrence of a genetic trait in several generations of a family |
Karyotype | Image of all of the chromosomes in a cell |