The following is a list of the "G" codes for MeSH

Mesh

Mesh consists of semi-permeable barrier made of connected strands of metal, fiber, or other flexible/ductile material. Mesh is similar to web or net in that it has many attached or woven strands.-Types of mesh:...

. It is a product of the United States National Library of Medicine

United States National Library of Medicine

The United States National Library of Medicine , operated by the United States federal government, is the world's largest medical library. Located in Bethesda, Maryland, the NLM is a division of the National Institutes of Health...

.

Source for content is here. (File "2006 MeSH Trees".)

--- gene frequency

--- gene flow

Gene flow

In population genetics, gene flow is the transfer of alleles of genes from one population to another.Migration into or out of a population may be responsible for a marked change in allele frequencies...

 --- genetic drift

Genetic drift

Genetic drift or allelic drift is the change in the frequency of a gene variant in a population due to random sampling.The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces...

--- genomic instability

--- chromosomal instability --- chromosome fragility

--- genotype

Genotype

The genotype is the genetic makeup of a cell, an organism, or an individual usually with reference to a specific character under consideration...

--- gene dosage

Gene dosage

Gene dosage is the number of copies of a gene present in a cell or nucleus. An increase in gene dosage can cause higher levels of gene product if the gene is not subject to regulation from elsewhere in the body....

 --- genetic predisposition to disease --- haplotypes --- heterozygote --- homozygote

--- inheritance patterns

--- anticipation, genetic --- extrachromosomal inheritance --- genes, mitochondrial --- genes, dominant --- genes, recessive --- genes, x-linked --- genes, y-linked --- multifactorial inheritance --- quantitative trait, heritable

--- linkage (genetics)

--- linkage disequilibrium

Linkage disequilibrium

In population genetics, linkage disequilibrium is the non-random association of alleles at two or more loci, not necessarily on the same chromosome. It is also referred to as to as gametic phase disequilibrium , or simply gametic disequilibrium...

 --- lod score

--- ploidies

--- aneuploidy

Aneuploidy

Aneuploidy is an abnormal number of chromosomes, and is a type of chromosome abnormality. An extra or missing chromosome is a common cause of genetic disorders . Some cancer cells also have abnormal numbers of chromosomes. Aneuploidy occurs during cell division when the chromosomes do not separate...

 --- monosomy

Monosomy

Monosomy is a form of aneuploidy with the presence of only one chromosome from a pair. Partial monosomy occurs when only a portion of the chromosome has one copy, while the rest has two copies.-Human monosomy:...

 --- trisomy

Trisomy

A trisomy is a type of polysomy in which there are three copies, instead of the normal two, of a particular chromosome. A trisomy is a type of aneuploidy .-Description and causes:...

 --- diploidy --- haploidy --- polyploidy

Polyploidy

Polyploid is a term used to describe cells and organisms containing more than two paired sets of chromosomes. Most eukaryotic species are diploid, meaning they have two sets of chromosomes — one set inherited from each parent. However polyploidy is found in some organisms and is especially common...

--- sequence homology

--- sequence homology, amino acid --- sequence homology, nucleic acid --- synteny

Synteny

In classical genetics, synteny describes the physical co-localization of genetic loci on the same chromosome within an individual or species. The concept is related to genetic linkage: Linkage between two loci is established by the observation of lower-than-expected recombination frequencies...

--- variation (genetics)

--- antibody diversity --- antigenic variation

Antigenic variation

Antigenic variation refers to the mechanism by which an infectious organism such as a protozoan, bacterium or virus alters its surface proteins in order to evade a host immune response. Immune evasion is particularly important for organisms that target long-lived hosts, repeatedly infect a single...

 --- genetic heterogeneity

Genetic heterogeneity

Genetic Heterogeneity is a phenomenon in which a single phenotype or genetic disorder may be caused by any one of a multiple number of alleles or non-allele mutations. This is in contrast to pleiotropy, where a single gene may cause multiple phenotypic expressions or disorders...

 --- mutation

Mutation

In molecular biology and genetics, mutations are changes in a genomic sequence: the DNA sequence of a cell's genome or the DNA or RNA sequence of a virus. They can be defined as sudden and spontaneous changes in the cell. Mutations are caused by radiation, viruses, transposons and mutagenic...

 --- allelic imbalance --- loss of heterozygosity

Loss of heterozygosity

Loss of heterozygosity in a cell is the loss of normal function of one allele of a gene in which the other allele was already inactivated. This term is mostly used in the context of oncogenesis; after an inactivating mutation in one allele of a tumor suppressor gene occurs in the parent's germline...

 --- chromosome deletion --- base pair mismatch --- codon, nonsense --- chromosome aberrations --- aneuploidy

Aneuploidy

Aneuploidy is an abnormal number of chromosomes, and is a type of chromosome abnormality. An extra or missing chromosome is a common cause of genetic disorders . Some cancer cells also have abnormal numbers of chromosomes. Aneuploidy occurs during cell division when the chromosomes do not separate...

 --- monosomy

Monosomy

Monosomy is a form of aneuploidy with the presence of only one chromosome from a pair. Partial monosomy occurs when only a portion of the chromosome has one copy, while the rest has two copies.-Human monosomy:...

 --- trisomy

Trisomy

A trisomy is a type of polysomy in which there are three copies, instead of the normal two, of a particular chromosome. A trisomy is a type of aneuploidy .-Description and causes:...

 --- chimerism --- chromosomal instability --- chromosome fragility --- chromosome breakage --- chromosome deletion --- inversion, chromosome --- isochromosomes --- micronuclei, chromosome-defective --- mosaicism --- ring chromosomes --- sex chromosome aberrations --- xyy karyotype --- translocation, genetic --- philadelphia chromosome

Philadelphia chromosome

Philadelphia chromosome or Philadelphia translocation is a specific chromosomal abnormality that is associated with chronic myelogenous leukemia . It is the result of a reciprocal translocation between chromosome 9 and 22, and is specifically designated t...

 --- uniparental disomy

Uniparental disomy

Uniparental disomy occurs when a person receives two copies of a chromosome, or part of a chromosome, from one parent and no copies from the other parent.. UPD could involve isodisomy or heterodisomy ....

 --- dna repeat expansion --- trinucleotide repeat expansion

Trinucleotide repeat expansion

Trinucleotide repeat expansion, also known as triplet repeat expansion, is the DNA mutation responsible for causing any type of disorder categorized as a trinucleotide repeat disorder. These are labelled in dynamical genetics as dynamic mutations. Triplet expansion is caused by slippage during DNA...

 --- frameshift mutation

Frameshift mutation

A frameshift mutation is a genetic mutation caused by indels of a number of nucleotides that is not evenly divisible by three from a DNA sequence...

 --- gene amplification --- gene duplication

Gene duplication

Gene duplication is any duplication of a region of DNA that contains a gene; it may occur as an error in homologous recombination, a retrotransposition event, or duplication of an entire chromosome.The second copy of the gene is often free from selective pressure — that is, mutations of it have no...

 --- genomic instability --- germ-line mutation --- mutation, missense --- point mutation

Point mutation

A point mutation, or single base substitution, is a type of mutation that causes the replacement of a single base nucleotide with another nucleotide of the genetic material, DNA or RNA. Often the term point mutation also includes insertions or deletions of a single base pair...

 --- sequence deletion --- chromosome deletion --- gene deletion

Genetic deletion

In genetics, a deletion is a mutation in which a part of a chromosome or a sequence of DNA is missing. Deletion is the loss of genetic material. Any number of nucleotides can be deleted, from a single base to an entire piece of chromosome...

 --- suppression, genetic --- polymorphism, genetic --- polymorphism, restriction fragment length --- polymorphism, single-stranded conformational --- polymorphism, single nucleotide