PARENTAL IMPRINTING
\pəɹˈɛntə͡l ɪmpɹˈɪntɪŋ], \pəɹˈɛntəl ɪmpɹˈɪntɪŋ], \p_ə_ɹ_ˈɛ_n_t_əl ɪ_m_p_ɹ_ˈɪ_n_t_ɪ_ŋ]\
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The variable phenotypic expression of a gene depending on whether it is of paternal or maternal origin, which is a function of the methylation pattern. Imprinted regions are observed to be more methylated and less transcriptionally active. (Segen, Dictionary of Modern Medicine, 1992)
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