Other Forms of Inheritance
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| Polygenic Trait | Trait controlled by two or more genes.
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| Co-dominance | When both alleles are completely expressed in the phenotype.
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| Incomplete Dominance | When one allele is not completely dominant over the other.
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| Sex-linked Gene | Gene located on a sex chromosome.
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| Pleiotropy | The control of more than one phenotypic characteristic by a single gene.
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| Linked Genes | Genes located near each other on the same chromosome that tend to be inherited together.
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| Barr body | A dense body formed by the deactivation of the X-chromosome found in the nuclei of female mammalian cells.
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| X-inactivation | When in female cells the extra X-chromosome switched off in the cells.
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