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Incomplete dominance

Definition

noun

A kind of dominance occurring in heterozygotes in which the dominant allele is only partially expressed, and usually resulting in an offspring with an intermediate phenotype.


Supplement

In incomplete dominance, a heterozygous organism carrying two alleles wherein one is dominant and the other one is recessive, (e.g. Aa), the dominant allele will only be partially expressed. Hence, the heterozygote (Aa) will have an intermediate phenotype.

A typical example is the color of the flower in which R symbolizes the dominant allele for red pigment and r is the recessive allele for no pigment. In incomplete dominance, the heterozygous plant carrying both alleles, Rr, will not be able to produce enough red pigment (since the dominant allele is only partially expressed) and therefore will appear pink.

Synonym: partial dominance.
Compare: complete dominance, codominance. See also: allele.


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genetic phenotype

... that i need someone to explain it to me what happens to the concepts dominance and recessiveness when we are able to read the DNa sequences in ... genetic phone type, do we describe it as dominance, co-dominance or incomplete dominance? thank you

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by ladwer
Mon Nov 05, 2012 6:52 pm
 
Forum: Genetics
Topic: genetic phenotype
Replies: 1
Views: 2209

Mendel's law

2. what comes to my mind - mitochondrial/plastidial genome, incomplete dominance, codominance etc.

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by JackBean
Mon Nov 05, 2012 12:11 pm
 
Forum: Genetics
Topic: Mendel's law
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Incomplete Dominance Biology Question?

Hey guys... The palomino horse results from the combination of two incompletely dominant genes, one codes for the colour chestnut and the other for cream. Determine the expected genotypic and phenotypic ratios for the following crosses: a.)chestnut and cream b.)palomino and cream c.) palomino and pa...

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by OnePieceKnight
Fri Mar 16, 2012 1:31 am
 
Forum: Genetics
Topic: Incomplete Dominance Biology Question?
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Views: 2439

Re: two different color eyes

... parents carried different dominant/recessive traits. This caused an incomplete dominance, where the 2 genes are only partially expressed.

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by Shri
Mon Mar 05, 2012 8:32 pm
 
Forum: Human Biology
Topic: two different color eyes
Replies: 141
Views: 274874

Additive Effects vs Epistatic Effects

... Is my second 'definition' more correct? So, in the case of complete dominance (on the same loci) can we call this an epistatic effect? What about co-dominance/incomplete dominance? Is this also epistatic? IE. the 3 genotypes: AA = Black Fur, aa = ...

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by ReMuSoMeGa
Tue Jan 24, 2012 10:45 pm
 
Forum: Genetics
Topic: Additive Effects vs Epistatic Effects
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