overdominance


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Related to overdominance: Multiple alleles

overdominance

[¦ō·vər′däm·ə·nəns]
(genetics)
Monohybrid heterosis, that is, the phenotype is being more pronounced in the heterozygote than in either homozygote with respect to a specified pair of alleles.
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In Boer, Matou and Nubi goats, the 651A/G in exon 2 was suggested as a useful marker for litter size of the second parity, showing an overdominance effect (Wu et al.
1991) studied the quantitative traits in bread wheat using graphic analysis, and showed that genes control the traits plant height and spike length by incomplete dominance, weight of 1000 seeds by complete dominance, number of seeds per spike, number of spikelet per spike, and seed weight per spike by overdominance.
Do extra exercises in order to decrease the overdominance of the quads.
Unlike positive or negative selection, which usually reduce genetic variability, increasing or decreasing the frequency of a particular genetic variant, many types of selection maintain polymorphisms, especially when overdominance, spatially heterogeneous environments, temporally varying environments, or epistasis are occurring.
With respect to what we have called the first level of analysis, that referring to the segments of the interactivity of the pairs during the task of text production, the overdominance of draft editing can be explained by its accumulating effect during each stage of the tutoring process.
In the present study, low x low gca combination also produced hybrids with high sea and this could be attributed to overdominance or epistatic gene action.
The use of minimal visual cues with the auditory-verbal method is supported by physiological studies that have shown that in deaf animals, an overdominance of visual inputs to the auditory cortex that lead to an incorrect balance between the auditory and visual systems needs to be corrected.
Increased run production, a new generation of high-profile managers, a new, young commissioner, the increased power of the players' union, revamped league formats and the introduction of playoffs, new multipurpose stadiums--all these coalesced to propel the national pastime beyond its lethargy of 1968, the most visible symptom of which was the overdominance of pitching, and it was this amalgamation that led baseball on the path to the current modern game.
This finding further suggested that an overdominance of any single terminator in the extension mixture promotes misincorporation.
He suggested the term overdominance for superior heterozygous loci and suggested recurrent selection with early testing (unfinished inbreds) for specific combining ability as a procedure to breed for such gene action (Hull, 1945, 1952).
The feature was the result of expression of a normal copy of a specific gene from the mother and a mutated copy of the same gene from the father--an inheritance pattern known as paternal polar overdominance.
Hitchhiking and associative overdominance at a microsatellite locus.