heterozygote
an organism formed by union of gametes that are unlike in their genetic content; contrast to homozygote
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
A selection model in which heterozygotes have the highest fitness.
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 ...
Heterozygote (also called hybrid) refers to an individual that has two different forms of the gene. Example: Aa
Homozygote refers to an individual that has two identical genes. Example: AA or aa ...
heterozygote advantage
A mechanism that preserves variation in eukaryotic gene pools by conferring greater reproductive success on heterozygotes over individuals homozygous for any one of the associated alleles.
heterozygous ...
Heterozygote
A diploid or partially diploid organism with different alleles of one or more particular genes.
Heterozygote (adj. heterozygous) An individual having two different alleles at a locus.
Heterozygote: With respect to a given genetic locus, a diploid individual carrying two different alleles.
Heterozygote an individual with a pair of two different alleles
(hetero = other‚ different; zygo = yoke)
Hibernation a long-term (seasonal) decrease in body functions
(hibern = winter) ...
Heterozygote See: heterozygosity
Highly conserved sequence DNA sequence that is very similar across several different types of organisms.
See also: gene, mutation ...
Double heterozygote: An individual who is heterozygous at two loci under investigation.
Heterozygote
The term coined by Bateson and Saunders (1902) for a zygote, or a diploid individual derived from it, which carries both members (Gk. heteros, different) of a pair of alleles.
heterozygote An organism in which homologous chromosomes contain different allelic forms (often dominant and recessive) of a locus; derived from a zygote formed by union of gametes of dissimilar allelic constitution.
Compound heterozygote
An individual who has 2 different mutant alleles at a given locus.
Related Terms:
Mutation
The term which De Vries introduced into biological literature for an abrupt change of genotype which is inherited.
Carrier (heterozygote) An individual who carries one copy of a recessive gene.
cDNA See complementary DNA.
Cell The basic structural unit of all living organisms.
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- The cross of a heterozygote with one of its parents
- A mutation that reverts the mutual gene to the wild type form; also called reverse mutation.
Bacteriophage ...
Dominant -- alleles that determine the phenotype displayed in a heterozygote with another (recessive) allele. Down syndrome -- a type of mental deficiency due to trisomy (three copies) of autosome 21, a translocation of 21 or mosaicism.
[cloning DNA] [cloning animals] Clonus Clostridia Clotting (coagulation) of blood CMA-676 Cnidaria Cocaine Cochlea Cockayne's syndrome CodominanceThe independent expression of each of two alleles in a heterozygote.
See Heterozygote, Phenotype. Initiation codon. The mRNA sequence AUG, coding for methionine, which initiates translation of mRNA. Inositol lipid.
co-dominant alleles Two different alleles at a locus are responsible for different phenotypes, and both alleles affect the phenotype of the heterozygote.
When heterozygotes are more fit than either of the homozygotes, however, selection causes genetic variation to be maintained. [heterozygote: an organism that has two different alleles at a locus.
The heterozygote carrier is said to have sickle cell trait. They are usually symptom free. The frequency of carriers among African Americans is 1/10 to 1/12. This relatively high frequency is due to a phenomenon known as heterozygote selection.
Heterozygote sickle cell carriers are much more resistant to malaria than those with just normal hemoglobin.
Codominant alleles occur when rather than expressing an intermediate phenotype, the heterozygotes express both homozygous phenotypes. An example is in human ABO blood types, the heterozygote AB type manufactures antibodies to both A and B types.
The situation in which a heterozygote shows the phenotypic effects of both alleles fully & equally, (eg blood group antigens).
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codominance A type of inheritance in which heterozygotes fully express both alleles.
codon A sequence of three nucleotides in messenger RNA that codes for a single amino acid.
The offspring of genetically different parents.
See also: heterozygote
Hybridization
The process of joining two complementary strands of DNA or one each of DNA and RNA to form a double-stranded molecule.
For two alleles (A and a) with frequencies p and q, there are three genotypes: ... heterozygote: An individual having two different alleles at a genetic locus. ...
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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.
 See also: Allele, Zygote, Gene, Chromosome, Organ
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