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Terms for Chapter 7

TermDefinition
Carrier Organism whose genome contains a gene for a certain trait or disease that is not expressed in the organism’s phenotype.
Codominance Heterozygous genotype that equally expresses the traits from both alleles.
Incomplete Dominance Heterozygous phenotype that is a blend of the two homozygous phenotypes.
Karyotype Image of all of the chromosomes in a cell.
Linkage Map Diagram that shows the relative locations of genes on a chromosome.
Pedigree Chart of the phenotypes and genotypes in a family that is used to determine whether an individual is a carrier of a recessive allele.
Polygenic Trait Trait that is produced by two or more genes.
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.
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