homozygous
in a diploid organism, characterized by both alleles being the same at a specific locus
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Homozygous
Homozygous is a genetic condition where an individual inherits the same alleles for a particular gene from both parents.
Narration Transcription ...
homozygous Having identical alleles for a given gene.
hormones Chemical substances that are produced in the endocrine glands and travel in the blood to target organs where they elicit a response.
Homozygous
A cell or organism where the same allele is carried by each member of a pair of homologous chromosomes.
Horseradish peroxidase
An enzyme that can be complexed to DNA for use in some non-radioactive DNA labeling procedures.
Homozygous See: homozygote
Human artificial chromosome (HAC) A vector used to hold large DNA fragments.
See also: chromosome, DNA
Human gene therapy See: gene therapy ...
[edit] Homozygous
An organism is referred to as being homozygous (Basically meaning of the same alleles) at a specific locus when it carries two identical copies of the gene affecting a given trait on the two corresponding homologous ...
Homozygous - when the two alleles are the same.
Heterozygous - when the two alleles are different, in such cases the dominant allele is expressed.
Dominant - a term applied to the trait (allele) that is expressed irregardless of the second allele.
homozygous Having two identical alleles for a given trait.
hood Dorsal wall of the camerostome that extends over the capitulum.
horizons Soil zones from the surface downward that reveal visible horizontal layers of soil.
an homozygous individual with a simple RFLP pattern
C.
a DNA sequence anywhere on the same chromosome ...
64% homozygous for BB (0.8 x 0.8 = 0.64)
32% Bb heterozygotes (0.8 x 0.2 x 2 = 0.32)
4% homozygous (bb) for gray coat (0.2 x 0.2 = 0.04)
So 96% of this generation will have black coats; only 4% gray coats.
True-breeding
Homozygous for the true-breeding trait. When selfing the trait will not segregate.
Related Terms:
Homozygosity
The presence of the same alleles at one or more loci. Cf. homozygote ...
After this point, no further change is possible; the population has become homozygous.
Enzyme deficiency disorders are usually AR (homozygous) since a heterozygote, with one good allele, still makes enough enzyme to be healthy. This is a gene dosage effect. The one good gene will produce half the normal amount of enzyme.
A cross between a heterozygote and the corresponding homozygous recessive.
In the cross of homozygous, wild-type females to homozygous, mutant males, all the F1 offspring are heterozygotes and appear normal. In the reciprocal cross, all of the F1 offspring are heterozygotes but have the mutant phenotype (Fig. 3).
The Japanese geneticist Motoo Kimura and American geneticist James Crow (1964) introduced the infinite alleles model, an attempt to determine for a finite population what proportion of loci would be homozygous.
Heterozygote advantage (or overdominant selection) is an example in which an allele selected against in the homozygous state is retained because of the superiority of heterozygotes (for an example and a list of all known examples, see Gemmell & ...
A double homozygous mutant of IP3R2 (IP3R type 2) and IP3R3 (IP3R type 3) shows a deficit of saliva secretion and gastric juice secretion suggesting that IP3Rs are essential for exocrine secretion.
Homozygote (adj. homozygous) An individual having two identical alleles at a locus.
Housekeeping gene A gene which is expressed at a similar level in almost all cells, presumably because its product is required for cell viability.
Breeding of an organism of unknown genotype with a homozygous recessive individual to determine the unknown genotype. The ratio of phenotypes in the offspring determines the unknown genotype.
testis pl. testes ...
Deletions are fragments of chromosomes that are missing. They are usually lethal when homozygous and cause abnormalities when heterozygous.
Radiation, viruses, chemicals, and unequal crossing-over may cause them.
Cri du Chat Syndrome ...
In essence, heterozygous (possessing opposing alleles Rr) organisms derived from homozygous (possessing the same alleles RR or rr) are created, they possess a phenotype different to that of both their parents.
A recessive mutation that is viable in zygotes, but in which homozygous mutant mothers produce inviable offspring.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
Brachydactyly shortfingeredness; genetic disorder in which the homozygous dominant genotype is not viable
(brachy = short; dactyl = finger or toe) ...
dominant An allele that produces the same character whether present in the homozygous or heterozygous state.
Recessive -- a gene that is phenotypically manifest in the homozygous state but is masked in the presence of a dominant allele.
 See also: Gene, Organ, Allele, Chromosome, Alleles
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