SYN: quasidominance.
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pseu·do·dom·i·nance -'däm-ə-.nən(t)s n appearance of a recessive phenotype in a heterozygote containing the recessive gene on one chromosome and a deletion or only part of the dominant gene on the corresponding part of the homologous chromosome
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pseu·do·dom·i·nance (soo″do-domґĭ-nəns) [pseudo- + dominance] 1. appearance of a recessive phenotype in a pedigree, the recessive allele being expressed due to loss of the dominant allele, as by a chromosomal deletion. 2. quasidominance.Medical dictionary. 2011.