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Recessive

Definition

adjective

(general) Going back; receding.

(genetics) Of, or pertaining to, a gene (or allele) whose phenotypic expression is masked by a dominant gene (or allele).

noun

(1) A recessive allele or trait.

(2) An organism whose recessive trait is discernible or expressed.


Supplement

In genetics, a recessive gene or allele is one in which the effect is not tangible, or is masked by the effects of the dominant gene. The recessive trait may be expressed when the recessive genes are in homozygous condition or when the dominant gene is not present. That happens when an organism inherits a pair of recessive genes from its parents.


Word origin: Latin recess(us), a withdrawal, receding part + -ive.

Related forms: recessiveness (noun), recessively (adverb).
Related terms:

Compare: dominant.


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Results from our forum


Re: two different color eyes

... are genetically different in the same way. So one eye expresses three color alleles and the other only one. If you originally had a dominant and recessive, one eye might have the chromosome carrying the blue, and the other the dominant. This also can produce patches in the eyes, on the skin,

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by sanjidcapa
Mon May 04, 2009 5:45 am
 
Forum: Human Biology
Topic: two different color eyes
Replies: 75
Views: 36911

association study confusion

... between relative risk (RR) and genotype relative risk (GRR)? 2.) what do the numbers under the different models in table 2 mean? why does recessive model have infinity for each study included in the meta-analysis? i'm thinking the values i asked about above describe the likelyhood of each ...

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by alt42
Mon Apr 27, 2009 10:25 pm
 
Forum: Genetics
Topic: association study confusion
Replies: 1
Views: 144

Re: Really puzzled with gene expresseion!!!!

Gene expression is managed by whether it's dominant or recessive. Unless it is incomplete dominance, then both are presented. For example, if a red flower is crossed with a white flower, the offspring will be pink flowers. If the inherited genes are ...

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by star4ysh
Sun Apr 26, 2009 7:12 pm
 
Forum: Genetics
Topic: Really puzzled with gene expresseion!!!!
Replies: 4
Views: 222

Re: Natural selection is proven wrong

... the years before that. You posted a long list of genetic disorders, but do you actually have any knowledge about them? Vast majority are either recessive genes, which pretty much lessens the evolutionary pressure to eliminate those genes, or are genes that only cause disease if combined to other ...

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by biohazard
Thu Apr 23, 2009 6:56 am
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 87
Views: 2486

Allele Frequency...

A population consists of 16% WHITE rabbits and 84% BLACK rabbits. The BLACK allele is DOMINANT. The WHITE allele is RECESSIVE. What is the frequency of the black allele in this population? What is the frequency of heterozygous rabbits in this population?

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by Funkfruit
Tue Mar 31, 2009 3:20 pm
 
Forum: Evolution
Topic: Allele Frequency...
Replies: 2
Views: 433
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