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- IchnovirusIchnovirus is a genus of viruses, in the family Polydnaviridae. Parasitoid wasps serve as
- IchtadenovirusIchtadenovirus is a genus of viruses, in the family Adenoviridae. Fish serve as natural ho
- IchthyologyScientific study of fish
- Ichthyophthirius multifiliisParasitic species of protozoan
- Idealised populationIn population genetics an idealised population is one that can be described using a number
- Idelisa BonnellyDominican marine biologist (1931–2022)
- Identity by descentConcept in genealogy and genetics
- IleumFinal section of the small intestine
- Illumina dye sequencingDNA sequencing method
- ImbricateaImbricatea is a class of Rhizaria characterised by silica scales. It is sometimes describe
- Immature ovumAn immature ovum is a cell that goes through the process of oogenesis to become an ovum. I
- Immortalised cell lineLineage of cells that evades senescence and continues dividing
- Immune receptorAn immune receptor (or immunologic receptor) is a receptor, usually on a cell membrane, wh
- Immune responseReaction occurring within an organism as a defence against a pathogen
- Immune toleranceState of unresponsiveness of the immune system
- ImmunogeneticsBranch of medical genetics
- Immunoglobulin AAntibody that plays a crucial role in the immune function of mucous membranes
- Immunoglobulin heavy chainThe immunoglobulin heavy chain (IgH) is the large polypeptide subunit of an antibody (immu
- Immunogold labellingImmunogold labeling or immunogold staining (IGS) is a staining technique used in electron
- ImmunosurgeryImmunosurgery is a method of selectively removing the external cell layer (trophoblast) of
- Impedance microbiologyMeasuring the microbial density in a sample via its electrical parameters
- Imperforate hymenAn imperforate hymen is a congenital disorder where a hymen without an opening completely
- Implantation (embryology)First stage of pregnancy
- Imprinting (psychology)Kinds of learning occurring at a particular age or a particular life stage
- In silicoLatin phrase referring to computer simulations
- In vitroLatin term meaning outside a natural biological environment
- In vivoProcess of testing biological interventions on whole, living organisms
- Inborn error of lipid metabolismMedical condition
- Inbred strainIndividuals nearly identical in genotype due to long inbreeding
- InbreedingReproduction by closely related organisms
- Inbreeding depressionReduced fitness as a result of inbreeding
- Incertae sedisTerm to indicate an uncertain taxonomic position
- Incest pornographyGenre of pornography
- Incest tabooCultural rule that prohibits incest
- Inclusion bodiesAggregates of specific proteins in neurons and tissues
- Inclusive fitnessMeasure of evolutionary success
- Incomplete lineage sortingCharacteristic of phylogenetic analysis
- Incubator (culture)Device used to grow and maintain microbiological cultures or cell cultures
- IncusBone of the middle ear
- IndelInsertions and deletions in a genome
- Indian Seed VaultSecure seed bank
- Indiana vesiculovirusIndiana vesiculovirus, formerly Vesicular stomatitis Indiana virus (VSIV or VSV) is a viru
- Indicator bacteriaBacteria measuring fecal water contamination
- Indole-3-butyric acidIndole-3-butyric acid (1H-indole-3-butanoic acid, IBA) is a white to light-yellow crystall
- Industrial fermentationBiochemical process applied in industrial production
- Industrial melanismIndustrial melanism is an evolutionary effect prominent in several arthropods, where dark
- Industrial microbiologyIndustrial microbiology is a branch of biotechnology that applies microbial sciences to cr
- Inferior anal nervesThe inferior rectal nerves (inferior anal nerves, inferior hemorrhoidal nerve) usually bra
- Inferior anastomotic veinThe inferior anastomotic vein (also known as the vein of Labbe) is one of several superfic
- Inferior cervical ganglionThe inferior cervical ganglion is one of the three cervical sympathetic ganglia (i.e. of t
- Inferior labial arteryThe inferior labial artery (inferior labial branch of facial artery) arises near the angle
- Inferior mesenteric lymph nodesThe inferior mesenteric lymph nodes consist of:
- Inferior phrenic arteriesThe inferior phrenic artery is a bilaterally paired artery of the abdominal cavity which r
- InflammasomeCytosolic multiprotein complex that mediates the activation of Caspase 1
- InflorescenceBotanical term for a cluster of flowers
- Infraspecific nameName of a taxon, at a rank lower than species
- IngestionConsumption of a substance by an organism
- Initial acquisition of microbiotaFormation of an organism's microbiota at birth
- Initiation factorProtein which binds to a ribosome during translation
- INK4INK4 is a family of cyclin-dependent kinase inhibitors (CKIs). The members of this family
- Innate immune systemImmunity strategy in living beings
- Innate lymphoid cellGroup of innate immune cells that are derived from common lymphoid progenitors
- Innate resistance to HIVA small proportion of humans show partial or apparently complete innate resistance to HIV,
- Inner ear regenerationInner ear regeneration is the biological process by which the hair cells and supporting ce
- Inorganic ionsInorganic ions in animals and plants are ions necessary for vital cellular activity. In bo
- Inositol phosphateInositol phosphates are a group of mono- to hexaphosphorylated inositols. Each form of ino
- Inositol trisphosphateChemical compound
- Inositol trisphosphate receptorInositol trisphosphate receptor (InsP3R) is a membrane glycoprotein complex acting as a Ca
- Insect morphologyDescription of the physical form of insects
- Insect mouthpartsAnatomical structures of insects
- Insect olfactionInsect olfaction refers to the function of chemical receptors that enable insects to detec
- Insect wingBody part used by insects to fly
- InsectivoreOrganism which eats insects
- InseminationIntroduction of semen or sperm into the genital tract of a female animal
- Insert (molecular biology)In Molecular biology, an insert is a piece of DNA that is inserted into a larger DNA vecto
- Insertion (genetics)Type of mutation
- Insertion sequenceKind of transposon
- Insertional mutagenesisIn molecular biology, insertional mutagenesis is the creation of mutations in DNA by the a
- Insular biogeographyStudy of the ecology of isolated habitats
- Insulin signal transduction pathwayHuman biochemical pathway
- Integral membrane proteinType of membrane protein that is permanently attached to the biological membrane
- Integral monotopic proteinIntegral monotopic proteins are permanently attached to the cell membrane from one side, a
- Integrin alpha MIntegrin alpha M (ITGAM) is one protein subunit that forms heterodimeric integrin alpha-M
- IntegronFeature of bacterial genomes
- IntegumentNatural covering in biology
- Intercalated discMicroscopic feature of cardiac muscle
- Intercostal musclesThe intercostal muscles comprise many different groups of muscles that run between the rib
- Intercostal nervesThe intercostal nerves are part of the somatic nervous system, and arise from the anterior
- InterferonSignaling proteins released by host cells in response to the presence of pathogens
- Interferon-stimulated geneAn interferon-stimulated gene (ISG) is a gene that can be expressed in response to stimula
- Intergenic regionIn genetics, a stretch of DNA sequences located between genes
- InterleukinInterleukins (ILs) are a group of cytokines (secreted proteins and signal molecules) that
- Interleukin-15 receptorInterleukin-15 receptor is a type I cytokine receptor, binding interleukin-15.
- Interleukin-21 receptorInterleukin 21 receptor is a type I cytokine receptor. IL21R is its human gene.
- Interleukin-4 receptorThe interleukin 4 receptor is a type I cytokine receptor. It is a heterodimer, that is, co
- Interleukin-7 receptorThe interleukin-7 receptor is a protein found on the surface of cells. It is made up of tw
- Interleukin-7 receptor-αInterleukin-7 receptor subunit alpha (IL7R-α) also known as CD127 (Cluster of Differentiat
- Interleukin-9 receptorInterleukin 9 receptor (IL9R) also known as CD129 (Cluster of Differentiation 129) is a ty
- Interlocus sexual conflictType of sexual conflict
- Intermembrane spacePart of a cell
- Intermittent preventive therapyIntermittent preventive therapy or intermittent preventive treatment (IPT) is a public hea
- Internal fertilizationUnion of an egg and sperm to form a zygote within the female body
- Internal pudendal arteryBlood vessel supplying blood to the external genitalia
- Internal pudendal veinsThe internal pudendal veins (internal pudic veins) are a set of veins in the pelvis. They
- Internal ribosome entry siteRNA element
- Internal transcribed spacerIntergenic DNA sequence separating ribosomal RNA genes
- International Biodeterioration and Biodegradation SocietyThe International Biodeterioration and Biodegradation Society (IBBS) is a scientific socie
- International Code of Nomenclature of ProkaryotesCode of nomenclature
- International Genetically Engineered MachineInternational competition
- International Journal of Systematic and Evolutionary MicrobiologyAcademic journal
- International Nomenclature of Cosmetic IngredientsThe International Nomenclature of Cosmetic Ingredients (INCI) are the unique identifiers f
- International Society for Forensic GeneticsThe International Society for Forensic Genetics – ISFG is an international non-profit scie
- International Society of Genetic GenealogyThe International Society of Genetic Genealogy (ISOGG) is an independent non-commercial no
- International Union of Biological SciencesInternational non-governmental organization
- International Union of Microbiological SocietiesScientific supraorganization
- International Year of Biodiversity2010 UN theme year
- Interosseous membrane of legThe interosseous membrane of the leg (middle tibiofibular ligament) extends between the in
- Intersex (biology)Sex characteristics between male and female
- Interspersed repeatInterspersed repetitive DNA is found in all eukaryotic genomes. They differ from tandem re
- Intervertebral discFibrocartilaginous structure of spine
- IntiminIntimin is a virulence factor (adhesin) of EPEC (e.g. E. coli O127:H6) and EHEC (e.g. E. c
- Intracellular parasiteMicroparasite that grows within a host cell
- Intracellular transportDirected movement of vesicles and substances within a cell
- IntracrineIntracrine refers to a hormone that acts inside a cell, regulating intracellular events. I
- Intracytoplasmic sperm injectionIn vitro fertilization procedure
- Intragenomic conflictDifferential transmission of genes residing in the same genome
- Intralocus sexual conflictIntralocus sexual conflict is a type of sexual conflict that occurs when a genetic locus h
- IntramacronucleataIntramacronucleata is a subphylum of ciliates. The group is characterized by the manner in
- IntrasporangiaceaeIntrasporangiaceae is an actinomycete family. The family is named after the type genus Int
- Introduced speciesSpecies introduced by human activity
- Introduction to geneticsNon-technical introduction to genetics
- Introduction to virusesA virus is a tiny infectious agent that reproduces inside the cells of living hosts. When
- IntrogressionTransfer of genetic material from one species to another
- IntronPart of a gene that is spliced away
- Invasion geneticsSubfield of genetics that studies biological invasions
- Invasion! (DC Comics)Invasion! was a three-issue comic book limited series and crossover event published in 198
- Invasive candidiasisInvasive candidiasis is an infection (candidiasis) that can be caused by various species o
- Inversion (evolutionary biology)Hypothesis in developmental biology
- Invertebrate zoologyStudy of animals without a backbone
- Inverted repeatNucleic acid sequence
- Iodamoeba buetschliiSpecies of amoeba
- IRF8Protein-coding gene in the species Homo sapiens
- IridoviridaeFamily of viruses
- Iris (anatomy)Colored part of an eye
- Irish peopleEthnic group native to the island of Ireland
- Iron-oxidizing bacteriaBacteria deriving energy from dissolved iron
- Irula peopleEthnic group in India
- Irving GottesmanPsychiatric geneticist
- ISCB FellowISCB Fellowship is an award granted to scientists that the International Society for Compu
- ISG20Protein-coding gene in the species Homo sapiens
- IsoformDifferent products from the same gene
- IsogamySexual reproduction form involving gametes of the same size
- Isogenic human disease modelsCells cultured for medical research
- IsoleucineChemical compound
- IsomaltoseIsomaltose is a disaccharide similar to maltose, but with a α-(1-6)-linkage instead of the
- IsoquinolineIsoquinoline is an individual chemical specimen - a heterocyclic aromatic organic compound
- IsoschizomerPair of restriction enzymes
- IxorheoridaIxorheorida is an order within the subclass Conoidasida of the phylum Apicomplexia. All me
- Izhemsky DistrictIzhemsky District (Russian: Иже́мский райо́н; Komi: Изьва район, Iźva rajon) is an adminis
- IκB kinaseThe IκB kinase (IkappaB kinase or IKK) is an enzyme complex that is involved in propagatin
- IκBαIκBα (nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor alpha;
