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Complete dominance

Definition

noun

A kind of dominance wherein the dominant allele completely masks the effect of the recessive allele in heterozygous condition.


Supplement

For instance, an individual carrying two alleles that are both dominant (e.g. AA), the trait that they represent will be expressed. But if the individual carries two alleles in a manner that one is dominant and the other one is recessive, (e.g. Aa), the dominant allele will be expressed while the recessive allele will be suppressed. Hence, the heterozygote (Aa) will have the same phenotype as that of the dominant homozygote (AA). This condition is called complete dominance.


Compare: incomplete dominance, codominance.
See also: allele, dominance.


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please help, phenotypic proportion

... in what proportions are expected in the F 2 gen-eration (assuming complete dominance for both genes)? b. If the original cross was AA bb 3 aa BB, what gametic proportions ...

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by clarissatania
Tue May 22, 2012 6:40 am
 
Forum: Genetics
Topic: please help, phenotypic proportion
Replies: 1
Views: 1881

Additive Effects vs Epistatic Effects

... dry way). 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 ...

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by ReMuSoMeGa
Tue Jan 24, 2012 10:45 pm
 
Forum: Genetics
Topic: Additive Effects vs Epistatic Effects
Replies: 1
Views: 2764

Re:

... loci, and not a result from the "absence" of blue-allele dominance? I did not say that "white" is a different locus. I said ... "white" is null allele of "blue" gene. Lastly, Does complete penetrance imply dominance? If an affected woman mates with a healthy ...

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by Cat
Wed Dec 14, 2011 9:58 pm
 
Forum: Genetics
Topic: Question about basic crossing.
Replies: 5
Views: 3530

Question about basic crossing.

... loci, and not a result from the "absence" of blue-allele dominance? I thought I could also ask another quick question (not related to this specific topic) here instead of creating a new thread. Does complete penetrance imply dominance? If an affected woman mates with a healthy ...

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by MrJules
Wed Dec 14, 2011 1:01 pm
 
Forum: Genetics
Topic: Question about basic crossing.
Replies: 5
Views: 3530

True-Breeding Crosses - HELP!!!

... 1850 red, 670 pink, and 831 white totalling 3351 individuals. Is this complete dominance of the red? For the F1 generation, I crossed C/C x c/c (C/C = red & c/c = white) ...

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by jduecker84
Thu Mar 24, 2011 8:37 pm
 
Forum: Genetics
Topic: True-Breeding Crosses - HELP!!!
Replies: 1
Views: 1833
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