Dictionary » H » Homozygous

Homozygous

Definition

adjective

(1) Of, or pertaining to an individual (or a condition in a cell or an organism) containing two copies of the same allele for a particular trait located at similar positions (loci) on paired chromosomes (see homologous chromosomes).

(2) Having two identical alleles that code for the same trait.


Supplement

A ‘homozygous’ organism for a particular trait is described to possess either a pair of dominant alleles (e.g. AA) or a pair of recessive alleles (e.g. aa).


Word origin: G. ‘homo’ meaning ‘same’ + zygous, which pertains to a zygote.

Related forms: homozygosity (noun).
Related phrases: homozygous recessive, homozygous dominant.

Compare: heterozygous.
See also: allele.


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CRISPR/Cas technology

... mutation, it can be bred out in 1-2 generations and even still, the off targets are primarily in intergenic noncoding sequence space ad exist in a homozygous state. Most people don't see much off-targeting. It took less than a year to make the mouse, generate the data and publish the paper. If ...

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by animodel123
Wed Mar 18, 2015 6:39 am
 
Forum: Genetics
Topic: CRISPR/Cas technology
Replies: 1
Views: 165

need help with some home work

Well,I am sorry to say this-But your first two answers are wrong! 1)See,recessive alleles can be expressed only and only in the homozygous condition.So you need not say specifically 'homozygous' for a recessive allele THAT HAS BEEN EXPRESSED. For example: Lets say that there is a gene ...

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by Athira
Fri Jan 16, 2015 7:33 am
 
Forum: Genetics
Topic: need help with some home work
Replies: 2
Views: 916

need help with some home work

1. can a man and a woman that are both homozygous for a recessive allele produce a heterozygote baby? I said yes here 2.Can A man and a woman that are both homozygous for a dominant allele produce a heterozygote baby? I said yes here 3. Can ...

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by scoe
Thu Jan 15, 2015 6:55 pm
 
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Re: Mendel's Law

... that trait since its gene for flower color has two different alleles. If the zygote contains a gene with two identical alleles, it is said to be homozygous. The application of Mendel's three laws makes it possible to predict the characteristics of offspring produced by parents of known genetic ...

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by Sheppie
Wed Dec 03, 2014 7:41 am
 
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Topic: Mendel's Law
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Genetics Pedigree Help Required

... recessive pattern? Can you not have, if it is autosomal dominant, each affected individual as heterozygous and each unaffected individual homozygous recessive; and if it is autosomal recessive you reverse it so that each affected individual is homozygous recessive and each unaffected individual ...

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by TheBell
Fri Mar 21, 2014 8:49 pm
 
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Topic: Genetics Pedigree Help Required
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