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Zoology
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NugoRama
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Joined: 11 Mar 2009
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15 Mar 2009 10:44:45 IST
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The sudden appearance of a recessive phenotype in a pedigree, due to deletion of a masking dominant gene. The phenomenon in which a recessive allele shows itself in the phenotype when only one copy of the allele is present, as in hemizygous alleles or in deletion heterozygotes
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15 Mar 2009 11:02:43 IST
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suppose frequency of an recessive allele is very high...in those cases, it appears as though it is following a pattern of dominant character in a pedigree analysis.. this is termed as pseudodominance.... another cause of this kind of pedigree chart is consanguineous marriage....












