Dictionary » G » Genotype



noun, plural: genotypes



(1) The entire set of genes in an organism.

(2) A set of alleles that determines the expression of a particular characteristic or trait (phenotype).


The genetic makeup of an individual or taxon.


The genotype refers to the entire set of genes in a cell, an organism, or an individual. A gene for a particular character or trait may exist in two allelic forms; one is dominant (e.g. A) and the other is recessive (e.g. a). Based on this, there could be three possible genotypes for a particular character: AA (homozygous dominant), Aa (heterozygous), and aa (homozygous recessive).

Word origin: Greek genos, race + Latin typus, type.

Related forms: genotypic (adjective), genotypically (adverb).
Related phrases: genotype frequency.

Compare: phenotype.

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Results from our forum


What is the probability that the offsprings have the same phenotype and genotype with both parents , with none of them if the parents are: AaBbCcDdEe x aaBbccDdee . I would really appreciate it if you could help me as soon as possible because i need this for ...

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by inasuli
Sun Mar 02, 2014 2:33 pm
Forum: Genetics
Topic: Genetics
Replies: 1
Views: 1195

Blood Genetics help please

... O allele and alter the sugar to produce A and B antigens, respectively. When both the A and B allele enzymes are present (i.e. in an individual of genotype AB), then both A and B antigens are present and the person has a blood group of AB. Because both the A and B antigens are produced, the A and ...

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by girlslovebarbie
Sat Feb 01, 2014 2:58 pm
Forum: Genetics
Topic: Blood Genetics help please
Replies: 2
Views: 2439

Have I understood this punnet square question ?

A plant with genotype SsYy is crossed with a plant with genotype ssYy. S (spherical seeds) and Y (yellow seeds) are dominant over s (wrinkled seeds) and y (green seeds), respectively. The genes for pea colour and shape are on different ...

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by girlslovebarbie
Sat Feb 01, 2014 2:55 pm
Forum: Genetics
Topic: Have I understood this punnet square question ?
Replies: 1
Views: 1610

Re: Theories - Origin of Life

FYI - I am one biologist that disagrees… Most mutations are neutral. It depends on whether you're talking about mutations to the genotype or mutations to the phenotype. Genotype. Change in phenotype is the result of the mutation. There can be no "mutations to the phenotype" by ...

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by Luxorien
Sat Nov 16, 2013 7:32 pm
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929012

Re: I Need Help understanding gametes, genotypes and phenotypes

I do not know how to go about this question. A man who has type AB blood marries a women with type B blood (her genotype is I^Bi). What phenotypes and genotypes of children could they produce. Would I do a punnet square with AB and Ii?

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by Jojo789
Tue Oct 29, 2013 3:06 am
Forum: Genetics
Topic: I Need Help understanding gametes, genotypes and phenotypes
Replies: 5
Views: 4234
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