heterozygous
pertaining to two different alleles at a specific locus in a diploid organism
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Heterozygous
Heterozygous refers to having inherited different forms of a particular gene from each parent.
heterozygous Having two different alleles (one dominant, one recessive) of a gene pair.
[edit] Heterozygous
An organism is a heterozygote or is heterozygous at a locus or gene when it has different alleles occupying the gene's position in each of the homologous chromosomes.
heterozygous plants have a different phenotype than either inbred parent because of incomplete dominance of the dominant allele.
E.
flower color inheritance in snapdragons does not behave as a Mendelian trait.
heterozygous A genotype for a given phenotypic expression containing a dominant and a recessive allele for that trait.
hexacanth Oncosphere; a six-hooked larva hatching from the egg of a eucestode.
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.
A heterozygous carrier of red-green colorblindness has some colorblind cells in her retina. The non-colorblind cells enable her to see color.
Mate two heterozygous mice and screen their offspring for the 1:4 that will be homozygous for the transgene.
Mating these will found the transgenic strain.
The Pronucleus Method (Method "2")
1. Prepare your DNA as in Method 1 ...
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.
Carrier -- an individual heterozygous for a single recessive gene. cDNA -- complementary DNA produced from a RNA template by the action of RNA- dependent DNA polymerase.
A condition where a heterozygous off- spring has a phenotype that is distinctly different from, and intermediate to, the parental phenotypes. See Heterozygote, Phenotype. Initiation codon.
heterozygous dominant (Hh) for Huntington's and the disease will manifest itself, since the dominant allele, H, is present. See id. Cystic fibrosis occurs in the presence of a homozygous recessive pair of alleles. See Janet A.
If sickle cell anemia is so deadly, why are so many people heterozygous carriers of the disease? Moreover, why does the disease afflict predominantly one racial group? Surpisingly, the answer has to do with malaria.
In regions of Africa where the malaria parasite was prevalent, the heterozygous state proved to be advantageous. The malaria parasite did not like the abnormal hemoglobin made by the sickle cell gene and did not infect the heterozygote.
When a single trait is being studied, a test cross is a cross between an individual with the dominant phenotype but of unknown genotype (homozygous or heterozygous) with a homozygous recessive individual.
Heterozygosity is simply the proportion of the population that is heterozygous. Equilibrium heterozygosity is given as H = 4Nv/[4Nv+1] (for diploid populations). H can vary from a very small number to almost one.
Dominance: The property possessed by some alleles of determining the phenotype for any particular gene by masking the effects of the other allele (when heterozygous).
If the allele distributes randomly, then the binomial theorem will apply: 32% of the population will be heterozygous for the allele (i.e. carry one copy of that allele and one copy of another in each somatic cell) and 4% will be homozygous (carrying ...
Allelic arrangement of two linked heterozygous loci, in which each homologous chromosome has one mutant (a or b) and one wild-type (A or B) allele (ie. Ab/aB). Two linked heterozygous gene pairs in the arrangement, Ab/aB.
A cross between an animal that is heterozygous for alleles obtained from two parental strains and a second animal from one of those parental strains. Also used to describe the breeding protocol of an outcross followed by a backcross.
Carrier A person heterozygous for a recessive trait.
cDNA - Complementary DNA - DNA which has at some point in its history been made by copying RNA using the enzyme reverse transcriptase. See the Techniques lecture ...
Recessive
A genetic trait that is not expressed in a heterozygous or partially heterozygous cell.
Recombinant DNA
A molecule of DNA in which a DNA fragment from a different source has been inserted.
A hybrid individual that is heterozygous for one gene or a single character.
monohybrid cross
A breeding experiment that uses parental varieties differing in a single character.
Incomplete dominance. A condition where a heterozygous off- spring has a phenotype that is distinctly different from, and intermediate to, the parental phenotypes. See Heterozygote, Phenotype.
incompletely dominant An allele combination that produces a phenotype in the heterozygous state that is distinct from the dominant homozygote and the recessive homozygote phenotypes. Also known as semi-dominant.
A Punnett square depicting a cross between two pea plants heterozygous for purple (B) and white (b) blossoms ...
An organism is homozygous for a gene if the alleles are identical, and heterozygous if they are different.
Related Terms:
Trait
An attribute or character of an individual within a species for which heritable differences can be defined.
 See also: Allele, Gene, Chromosome, Organ, Alleles
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