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- H. Allen OrrH. Allen Orr (born 1960) is the Shirley Cox Kearns Professor of Biology at the University
- H3K27acHistone acetylation on the tail of histone H3
- HA-tagSurface glycoprotein
- Habit (biology)Characteristic growth or behavior
- Habitat destructionProcess by which a natural habitat becomes incapable of supporting its native species
- Habitat fragmentationDiscontinuities in an organism's environment causing population fragmentation
- HACEK organismsGroup of bacteria
- Haemochromatosis type 3Haemochromatosis type 3 is a type of iron overload disorder associated with deficiencies i
- HaemophilusGenus of bacteria
- Haemophilus ducreyiSpecies of gram-negative, pathogenic bacterium
- Haemophilus haemolyticusHaemophilus haemolyticus is a species of gram-negative bacteria that is related to Haemoph
- Haemophilus parahaemolyticusHaemophilus parahaemolyticus is a species of anaerobic Gram-negative coccobacilli from the
- HaemoproteidaeThe Haemoproteidae are a family of parasitic alveolates in the phylum Apicomplexa.
- HaemoproteusGenus of single-celled organisms
- HaemosporidaOrder of protists
- HaemosporidiasinaSubclass of single-celled organisms
- Hafnia (bacterium)Genus of bacteria
- Hair cellAuditory sensory receptor nerve cells
- Hair follicleOrgan found in mammalian skin
- Hairpin ribozymeThe hairpin ribozyme is a small section of RNA that can act as a ribozyme. Like the hammer
- Hairy root cultureHairy root culture, also called transformed root culture, is a type of plant tissue cultur
- HalanaerobiumHalanaerobium is a gram-negative, non-endospore-forming, rod-shaped, and strictly anaerobi
- HaloarchaeaClass of salt-tolerant archaea
- HalobacteriaceaeFamily of archaea
- HalobacterialesOrder of archaea
- HalomonadaceaeHalomonadaceae is a family of halophilic Pseudomonadota.
- HalophileOrganisms that live in high salt concentrations
- HalopseudomonasHalopseudomonas is a genus of pseudomonad bacteria.
- HaloquadratumHaloquadratum (common abbreviation: Hqr.) is a genus of archaean, belonging to the family
- Haloquadratum walsbyiSpecies of halotolerant archaea
- HalotoleranceAdaptation of living organisms to conditions of high salinity
- HalspiviridaeFamily of viruses
- Hammerhead ribozymeRNA family
- Hamus (archaea)Archaea, one of the three domains of life, are a highly diverse group of prokaryotes that
- Handicap principleHypothesis in evolutionary biology
- Hans Christian GramHans Christian Joachim Gram (13 September 1853 – 14 November 1938) was a Danish bacteriolo
- HaplodiploidyBiological system where sex is determined by the number of sets of chromosomes
- HaplogroupGroup of similar haplotypes
- Haplogroup A-P305Haplogroup A-P305 also known as A1 is a human Y-chromosome DNA haplogroup. Like its parent
- Haplogroup BTHaplogroup BT M91, also known as Haplogroup A1b2 (and formerly as A4, BR and BCDEF), is a
- Haplogroup CFHaplogroup CF, also known as CF-P143 and CT(xDE), is a human Y-chromosome DNA haplogroup.
- Haplogroup CTHaplogroup CT is a human Y chromosome haplogroup. CT has two basal branches, CF and DE. DE
- Haplogroup DEHaplogroup DE is a human Y-chromosome DNA haplogroup. It is defined by the single nucleoti
- Haplogroup E-M329Haplogroup E-M329, also known as E1b1a2, is a human Y-chromosome DNA haplogroup. E-M329 is
- Haplogroup E-V38Human Y-chromosome DNA haplogroup
- Haplogroup GHIJKHaplogroup GHIJK, defined by the SNPs M3658, F1329, PF2622, and YSC0001299, is a common Y-
- Haplogroup HIJKHaplogroup HIJK, defined by the SNPs F929, M578, PF3494 and S6397, is a common Y-chromosom
- Haplogroup NO1Haplogroup NO1 (M214/Page39; F176/M2314; CTS5858/M2325/F346; CTS11572), also known as NO-M
- Haplogroup P1 (Y-DNA)Haplogroup P1, also known as P-M45 and K2b2a, is a Y-chromosome DNA haplogroup in human ge
- Haplogroup R-FTG47Haplogroup R-FTG47 is a rare subclade of the Y-chromosome haplogroup R-P249 (also known as
- Haplogroup R-M124Human Y-chromosome DNA haplogroup
- Haplogroup R1bType of paternal lineage
- Haplogroup R2Human Y-chromosome DNA haplogroup
- Haplogroup T (mtDNA)Human mitochondrial DNA haplogroup
- Haplogroup UHuman mitochondrial DNA haplogroup
- Haplogroup X (mtDNA)Human mitochondrial DNA haplogroup
- Haplogroup YHuman mitochondrial DNA grouping indicating common ancestry
- HaploinsufficiencyConcept in genetics
- HaplotypeGroup of genes from one parent
- Hardy–Weinberg principlePrinciple in genetics
- Harold J. ConnHarold Joel Conn (May 29, 1886 – November 10, 1975) was an American agricultural bacteriol
- Harvard Museum of Natural HistoryNatural history museum in Massachusetts
- Harvey A. CarrHarvey A. Carr (April 30, 1873 – June 21, 1954), a founding father of functionalist psycho
- Harvey Levy (academic)American geneticist
- Harvey PirieDr James Hunter Harvey Pirie FRSE FRCPE (10 December 1878 – 27 September 1965) was a 20th-
- Hazards of synthetic biologyDangers presented by artificial and modified organisms
- He Jiankui affair2018 scientific and bioethical controversy
- HealingProcess of the restoration of health
- Health survival paradoxSociological medical phenomenon
- Health systemOrganization of people, institutions and resources
- Health technologyApplication of organized knowledge and skills to solve health problems
- Heart valveFlap of tissue that prevent backflow of blood around the heart
- Heat shock factorIn molecular biology, heat shock factors (HSF), are the transcription factors that regulat
- Heat shock proteinFamily of proteins
- Heat shock responseThe heat shock response (HSR) is a cell stress response that increases the number of molec
- Heat-labile enterotoxin familyIn molecular biology, the heat-labile enterotoxin family includes Escherichia coli heat-la
- Hedgehog signaling pathwayThe Hedgehog signaling pathway is a signaling pathway that transmits information to embryo
- Hedychium gardnerianumHedychium gardnerianum, the Kahili ginger, Kahila garland-lily or ginger lily, is a specie
- Hektoen enteric agarSelective and differential agar
- HelicaseClass of enzymes that unpack genetic material
- HelicobacterGenus of bacteria
- Helicobacter bilisHelicobacter bilis is a bacterium in the Helicobacteraceae family, Campylobacterales order
- Heliconius numataHeliconius numata, the Numata longwing, is a brush-footed butterfly species belonging to t
- HeliobacteriaHeliobacteria are a unique subset of prokaryotic bacteria that process light for energy. D
- HeliozoaGroup of protists with spherical bodies
- HelixSpace curve that winds around a line
- Helix-turn-helixStructural motif capable of binding DNA
- HemangioblastHemangioblasts are the multipotent precursor cells that can differentiate into both hemato
- HematophagyEcological niche involving feeding on blood
- Hematopoietic stem cellStem cells that give rise to other blood cells
- Hemoglobin electrophoresisHemoglobin electrophoresis is a blood test that can detect different types of hemoglobin.
- Hemoglobin H diseaseHemoglobin H disease, also called alpha-thalassemia intermedia, is a disease affecting hem
- HemoliviaGenus of single-celled organisms
- Hemolysis (microbiology)Breakdown of red blood cells
- HemostasisProcess of preventing and stopping bleeding
- Henry Walter BatesEnglish naturalist and explorer
- HepadnaviridaeFamily of viruses
- Hepatic portal systemSystem of veins comprising the hepatic portal vein and its tributaries
- Hepatitis B virusSpecies of the genus Orthohepadnavirus
- HER2Mammalian protein found in humans
- Herbaceous plantPlant that has no persistent woody stem above ground
- HERC2HERC2 is a giant E3 ubiquitin protein ligase, implicated in DNA repair regulation, pigment
- Hereditary breast–ovarian cancer syndromeHereditary breast–ovarian cancer syndromes (HBOC) are cancer syndromes that produce higher
- Hereditary haemochromatosisGenetic condition involving iron buildup
- HeritabilityEstimation of effect of genetic variation on phenotypic variation of a trait
- Heritability of autismThe heritability of autism is the proportion of differences in expression of autism that c
- Hermann LönsHermann Löns (29 August 1866 – 26 September 1914) was a German journalist and writer. He i
- HermaphroditeOrganism that produces both male and female gametes
- Herminiimonas glacieiSpecies of bacterium
- HerpetologyStudy of amphibians and reptiles
- Herschel K. MitchellHerschel Kenworthy Mitchell (November 27, 1913 – April 1, 2000) was an American professor
- Hershey–Chase experimentDNA experiment
- HeterochromatinCompact and highly condensed form of chromatin
- Heterochromatin protein 1Protein family
- HeterochronyEvolutionary change in the timing of an organism's development
- Heterogametic sexThe heterogametic sex (or digametic sex) is the sex of a species where an individual's gam
- Heterogeneous ribonucleoprotein particleMacromolecular complex containing protein and RNA molecules
- Heterologous expressionExpression of a gene in an organism previously without it
- HeteromerA heteromer is something that consists of different parts; the antonym of homomeric. Examp
- HeteroplasmyPolymorphism of organellar DNA sequences in a cell
- HeterosisDifference in a quantitative trait between heterozygous and homozygous genotypes
- HeterothermyMetabolic system
- HeterotrophOrganism that ingests organic carbon for nutrition
- Heterotrophic nutritionHeterotrophic nutrition is a mode of nutrition in which organisms depend upon other organi
- Heterotrophic picoplanktonNon-photosynthesising plankton
- Heterozygote advantageCase in which having two different versions of a gene provides an advantage
- HEXAHexosaminidase A (alpha polypeptide), also known as HEXA, is an enzyme that in humans is e
- HexosaminidaseHexosaminidase (EC 3.2.1.52, β-acetylaminodeoxyhexosidase, N-acetyl-β-D-hexosaminidase, N-
- Heyndrickxia coagulansSpecies of bacterium
- High-mobility groupGroup of proteins
- Hildred Mary ButlerAustralian microbiologist
- HippeastrinaeHippeastrinae is a subtribe of plants classified under the tribe Hippeastreae. It belongs
- HippeastrumGenus of flowering plants
- HippocampusVertebrate brain region
- Histamine H2 receptorMammalian protein found in Homo sapiens
- HistidineChemical compound
- Histidine kinaseHistidine kinases (HK) are multifunctional, and in non-animal kingdoms, typically transmem
- HistogenesisHistogenesis is the formation of different tissues from undifferentiated cells. These cell
- HistologyStudy of the microscopic anatomy of cells and tissues of plants and animals
- HistoneProtein family around which DNA winds to form nucleosomes
- Histone acetylation and deacetylationHistone acetylation and deacetylation are the processes by which the lysine residues withi
- Histone acetyltransferaseEnzymes that catalyze acyl group transfer from acetyl-CoA to histones
- Histone codeProposed biochemical transcription of genetic information
- Histone H1Histone H1 is one of the five main histone protein families which are components of chroma
- Histone H3Histone H3 is one of the five main histones involved in the structure of chromatin in euka
- Histone H4Histone H4 is one of the five main histone proteins involved in the structure of chromatin
- Histone methylationModification of histones by addition of methyl groups
- Histone methyltransferaseClass of enzymes
- Histone octamerIn molecular biology, a histone octamer is the eight-protein complex found at the center o
- Histone variantsProteins that substitute in eukaryotes
- Histone-modifying enzymesType of enzymes
- History of HIV/AIDSAIDS is caused by a human immunodeficiency virus (HIV), which originated in non-human prim
- History of molecular evolutionHistory of the field of study
- History of penicillinAspect of medical history
- History of polymerase chain reactionThe history of the polymerase chain reaction (PCR) has variously been described as a class
- History of speciationThe scientific study of speciation — how species evolve to become new species — began arou
- History of syphilisThe first recorded outbreak of syphilis in Europe occurred in 1494/1495 in Naples, Italy,
- History of virologyThe history of virology – the scientific study of viruses and the infections they cause –
- History of zoology (1859–present)This article considers the history of zoology since the theory of evolution by natural sel
- History of zoology through 1859The history of zoology before Charles Darwin's 1859 theory of evolution traces the organiz
- Hitlers Zweites Buch (1928)Hitler's unpublished second book, focusing on foreign policy
- HLA A1-B8-DR3-DQ2Human genotype
- HLA-A1HLA-A1 (A1) is a human leukocyte antigen serotype within HLA-A "A" serotype group. The ser
- HLA-A11HLA-A11 (A11) is a human leukocyte antigen serotype within HLA-A "A" serotype group. The s
- HLA-BProtein-coding gene in the species Homo sapiens
- HLA-B51HLA-B51 (B51) is an HLA-B serotype. The serotype identifies the more common HLA-B*51 gene
- HLA-B8HLA-B8 (B8) is an HLA-B serotype. The serotype identifies the HLA-B*08 gene products. (For
- HLA-CProtein-coding gene in the species Homo sapiens
- HLA-DOHuman leukocyte histocompatibility complex DO (HLA-DO) is an intracellular, dimeric non-cl
- HLA-DQ1Serotype that covers a broad range of HLA-DQ haplotypes
- HLA-DQ5HLA-DQ5 (DQ5) is a human leukocyte antigen serotype subgroup within HLA-DQ(DQ) serotypes.
- HLA-DQ6HLA-DQ6 (DQ6) is a human leukocyte antigen serotype within HLA-DQ (DQ) serotype group. The
- HLA-DQB1Protein-coding gene in the species Homo sapiens
- HLA-DR52HLA-DR52 is an HLA-DR serotype that recognizes gene products of HLA-DRB3 locus. Three alle
- HLA-DRB3HLA class II histocompatibility antigen, DRB3-1 beta chain is a protein that in humans is
- HNoMS Pol IIIPol III was a patrol boat of the Royal Norwegian Navy, used for guarding the inlet of the
- Holliday junctionBranched nucleic acid structure
- Hologenome theory of evolutionOrganism as host plus microbe community
- HomeoboxDNA pattern affecting anatomy development
- Homeobox protein NANOGMammalian protein found in humans
- HomeosisIn evolutionary developmental biology, homeosis is the transformation of one organ into an
- HomeostasisState of steady internal conditions maintained by living things
- HomeothermyMaintaining stable internal body temperature
- Homeotic geneGenes regulating the development of anatomical structures in various organisms
- Homing endonucleaseType of enzyme
- Homologous chromosomeChromosomes that pair in fertilization
- Homologous recombinationGenetic recombination between identical or highly similar strands of genetic material
- Homology (biology)Shared ancestry between a pair of structures or genes in different taxa
- Homology directed repairMechanism of DNA repair in cells
- Homonym (biology)Scientific name that is identical in spelling to a name with a different type
- HomoplasyHomoplasy, in biology and phylogenetics, is the term used to describe a feature that has b
- HomoserineHomoserine (also called isothreonine) is an α-amino acid with the chemical formula HO2CCH(
- Hood mockingbirdThe Hood mockingbird (Mimus macdonaldi), also known as the Española mockingbird, is a spec
- HoofTip of a toe of an ungulate mammal, strengthened by a thick and horny keratin covering
- Horace Freeland JudsonHorace Freeland Judson (April 21, 1931 – May 6, 2011) was a journalist and later with more
- Horizon DiscoveryHorizon Discovery Group plc (LSE: HZD) ("Horizon"), is a gene editing company that designs
- Horizontal gene transferTransfer of genes from unrelated organisms
- Horn (anatomy)Animal anatomy of hornlike growths
- Horticulture industryThe horticulture industry embraces the production, processing and shipping of and the mark
- Host (biology)Organism that harbours another organism
- Host adaptationWhen considering pathogens, host adaptation can have varying descriptions. For example, in
- Host tropismInfection specificity of pathogens
- Host–parasite coevolutionMutually adaptive genetic change of a host and a parasite
- Host–pathogen interactionBiological interrelationship
- Hot flashPhysiological symptom
- HOTAIRHOTAIR (for HOX transcript antisense RNA) is a human gene located between HOXC11 and HOXC1
- Housekeeping geneGene which maintains basic cellular functions
- Howard Hughes Medical InstituteAmerican nonprofit organization
- Hox geneGroup of genes
- HRASProtein-coding gene in humans
- Hsp90Hsp90 (heat shock protein 90) is a chaperone protein that assists other proteins to fold p
- HUGO Gene Nomenclature CommitteeCommittee for human gene name standards
- Human artificial chromosomeA human artificial chromosome (HAC) is a microchromosome that can act as a new chromosome
- Human behaviour geneticsField that examines the role of genetic and environmental influences on human behaviour
- Human biologyInterdisciplinary area of study of the biology of the human species
- Human bycatchPeople who are unintentionally recorded by wildlife monitoring equipment
- Human disease modifier geneType of modifier gene
- Human embryonic developmentDevelopment and formation of the human embryo
- Human evolutionary developmental biologyEvolution of developmental processes in humans
- Human evolutionary geneticsStudy of differences between human genomes
- Human fecesMetabolic waste of the human digestive system
- Human fertilizationUnion of a human egg and sperm
- Human genetic enhancementTechnologies to genetically improve human bodies
- Human genetic variationGenetic diversity in human populations
- Human geneticsStudy of inheritance as it occurs in human beings
- Human Genome ProjectInternational scientific research project (1990–2003)
- Human hair growthThe growth of human hair occurs everywhere on the body except for the soles of the feet, t
- Human heightAspect of human growth
- Human Microbiome ProjectThe Human Microbiome Project (HMP) was a United States National Institutes of Health (NIH)
- Human milk microbiomeCommunity of microorganisms in human milk
- Human mitochondrial DNA haplogroupHaplogroup defined by differences in human mitochondrial DNA
- Human mitochondrial geneticsStudy of the human mitochondrial genome
- Human mitochondrial molecular clockThe human mitochondrial molecular clock is the rate at which mutations have been accumulat
- Human pathogenOrganism that causes disease in humans
- Human Proteome ProjectScientific project coordinated by the Human Proteome Organization
- Human reproductionProcreative biological processes of humanity
- Human Reproduction (journal)Academic journal
- Human skeletal changes due to bipedalismEvoltionary changes to the human skeleton as a consequence of bipedalism
- Human somatic variationHuman somatic variations are somatic mutations (mutations that occur in somatic cells) bot
- Human vestigialityHuman traits which lost their original function through evolution
- Human Y-chromosome DNA haplogroupHuman DNA groupings
- Human β-globin locusThe human β-globin locus is a cluster of genes located on chromosome 11. It is responsible
- HumanzeeHypothetical hybrid species
- HumerusLong bone of the upper arm
- Hyaline cartilageType of cartilage in humans
- Hybrid iguanaHybrid lizard
- Hybrid speciationForm of speciation involving hybridization between two different species
- Hybrid swarmPopulation of hybrids beyond first hybrid generation
- Hybrid zonePopulation genetics term
- Hydractinia symbiolongicarpusHydractinia symbiolongicarpus is one of the 30 + Hydractinia species known worldwide. This
- Hydrocarbonoclastic bacteriaHydrocarbonoclastic bacteria (also known as hydrocarbon degrading bacteria, oil degrading
- HydrogelSoft water-rich polymer gel
- HydrolaseClass of enzymes which use water to break a chemical bond
- Hydrothermal vent microbial communitiesUndersea unicellular organisms
- HymenMembrane that surrounds or partially covers the vaginal opening
- HymenostomeThe hymenostomes are an order of ciliate protozoa. Most are free-living in freshwater, suc
- Hyoid boneBone situated in the neck between the chin and the thyroid-cartilage
- HypercalcaemiaHigh calcium (Ca2+) level in the blood serum
- HypercarnivoreAnimals with more than 70% meat in their diets
- Hypersensitive siteRegion of DNA with increased binding of transcription factors and nucleases
- HyperthermophileOrganism that thrives in extremely hot environments from 60°C upward
- HyphochytriomycetesGroup of protists
- HyphomicrobialesOrder of bacteria
- HypocarnivoreAnimals with less than 30% meat in their diets
- HypocotylPlant part
- HypophthalmusHypophthalmus is a genus of long-whiskered catfishes native to freshwater in tropical and
- HypothalamusArea of the brain below the thalamus
- HypovirusFamily of viruses
