Dictionary » G » Genotype

Genotype

Definition

noun, plural: genotypes

noun

(genetics)

(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).

(zoology)

The genetic makeup of an individual or taxon.


Supplement

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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genotype ratio and phenotype ratio in X linked allege

Ok I how would I write out the genotype and phenotype for a X link recessive gene when after the punnett square the two females are not effect and the two males are effected?

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by greenchicken
Wed Mar 18, 2015 8:57 pm
 
Forum: Genetics
Topic: genotype ratio and phenotype ratio in X linked allege
Replies: 0
Views: 58

genotypic ratio and phenotypic ratio

Ok what would the genotype ratio and phenotype ratio be in the problem below RT Rt rT rt Rt RRTt RRtt RrTt Rrtt Rt RRTt RRtt RrTt Rrtt Rt RRTt RRtt RrTt Rrtt Rt RRTt RRtt RrTt Rrtt R round r wrinkled T tall t short

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by greenchicken
Wed Mar 18, 2015 8:53 pm
 
Forum: Genetics
Topic: genotypic ratio and phenotypic ratio
Replies: 0
Views: 34

Need some help in this bio question

... question, if you allowed plants with round leaves from the F1 generation to self-fertilize, could you obtain offspring (F2 plants) with the genotype AA? If so, which proportion would you expect? a) 0, you could not get this genotype b) 1/4 would be AA c) 1/2 would be AA d) 3/4 would be AA ...

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by bradnoell
Thu Feb 05, 2015 2:33 am
 
Forum: Genetics
Topic: Need some help in this bio question
Replies: 0
Views: 328

Re: need help with some home work

I agree with Athira here. Your first two answers are wrong. You can visualize a cross. aa x aa will never give Aa genotype for a baby. AA X AA will never give a Aa baby. oN THE FACE of it, if you have a parent Aa cross with AA, you should get a baby with either AA or Aa right? However, ...

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by Youngji
Sun Feb 01, 2015 1:14 pm
 
Forum: Genetics
Topic: need help with some home work
Replies: 2
Views: 916

I have got some BIG issues! forgive the long post

... invariant, the RH30 locus harbors a large repertoire of allelic diversity at the level of populations. Because crossing over cannot occur, the genotype Cde/cde is impossible in a child from this mating. Even though the father has C, d, and e genes, the Cde and cde on each chromosome are always ...

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by saddy51
Sun Jan 04, 2015 10:39 am
 
Forum: Genetics
Topic: I have got some BIG issues! forgive the long post
Replies: 1
Views: 1752
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