Chapter 7 Terms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| carrier | organism whose genome contains a gene for a certain trait or disease that is not expressed in the organism's phenotype
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| sex-linked gene | gene that is located on a sex chromosome
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| X chromosome inactivation | process that occurs in female mammals in which one of the x chromosomes is randomly turned off in a cell
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| incomplete dominance | heterozygous phenotype that is a blend of the two homozygous phenotypes
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| codominance | heterozygous genotype that equally expresses traits from both alleles
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| polygenic trait | trait that is produced by two or more genes
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| linkage map | diagram that shows the relative locations of genes on a chromosome
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| 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
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| karyotype | image of all the chromosomes in a cell
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