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G

G1, G2, G0
[phases of cell cycle]
GABA receptors
Gage, Phineas
Galactose
Galapagos Islands
Games parasites play
Gamete
Haploid reproductive cell which, after fusion with another gamete, forms a zygote. [More]
Gametophyte
Haploid, gamete-producing stage in the life cycle of a plant. [Discussion] [in angiosperms] [in ferns] [in mosses]
Gametophytic self-incompatibility (GSI)
Gamma aminobutyric acid (GABA) Receptors
Gancyclovir (also spelled ganciclovir)
Ganglion
Small mass of nerve tissue containing the cell bodies of neurons. [sympathetic ganglia]
Ganglion cells
[of human retina] [in visual processing]
Gap junctions
Gas constant
Gas exchange
[in humans] [in other vertebrates] [in insects] [in leaves and stems]
Gastrin
Gastropoda
Gastrulation
[in frog embryo]
Gaucher's disease
G band
Gel blotting
Geminin
Gene conversion
Gene flow
Gene locus
Location of a particular gene (or one of its alleles) on a chromosome. [examples]
Gene pool
Generator potential
Genes, reporter
Gene therapy
[using retroviral vectors] [using an adeno-associated virus (AAV) vector] [using no vector]
Genetic code
Genetic drift
Genetic mosaics
Genetic testing
[sickle-cell disease] [with in vitro fertilization]
Genome
A complete haploid set of genes. [genome sizes] [The Human Genome Projects] [mitochondrial] [chloroplast]
Genotype
Genetic constitution of an individual.
Genus
A taxonomic category that includes (usually) several closely related species. Similar genera are grouped in a family. Humans (Homo sapiens) belong to the genus Homo.
Geological eras and periods
Germination
Resumption of growth of the embryo within a seed, or of a spore. [germination in seeds]
Germline
Gerstmann-Sträussler-Scheinker disease (GSS)
Ghrelin
giant (gt)
[role of gene in Drosophila segmentation]
Gibberellins
Gibbs, Josiah Willard
Gill slits
Paired openings from the pharynx to the exterior that occur in many aquatic chordates when the gill pouches open out at the branchial grooves. [View]
Girdling
Glands
[exocrine] [endocrine]
Gleevec® (also known as STI571 and imatinib mesylate)
Glia
Global warming
Glomerulus
Glucagon
Glucocorticoids
[Discussion] [receptor bound to response element]
Gluconeogenesis
Glucose
[structure] [homeostatic regulation of]
Glutamic acid
[structure] [as neurotransmitter]
Glutamine
Glycation
Glycerol
Glycine
[structure] [as neurotransmitter]
Glycogen
Glycogenolysis
Glycolysis
Glycopeptide antibiotics
Glycophorin A
Glycoproteins
Glycosidic bond
Glycosylation
Goiter
Golgi apparatus
[Discussion] [in protein kinesis]
Gonad
Organ that produces gametes, sperm in males, eggs in females. In humans, the gonads also make sex hormones.
Gonadotropin-releasing hormone (GnRH)
Gondwana
Gonorrhea
Goodpasture's syndrome
gp120
[role in death of CD4+ T cells]
G-protein-coupled receptors (GPCRs)
[odor receptors] [pheromone receptors] [peptide hormone receptors] [taste receptors] [rhodopsin] [GABAB receptors] [opiate receptors] [serotonin receptors] [Ca2+ receptor]
G proteins
Grafting (in plants)
Graft rejection
[mechanism] [preventing]
Graft-versus-host disease (GVHD)
Immune attack against the host mediated by T cells in a transplanted organ or tissue (e.g., bone marrow). [More] [still more]
Graft-versus-leukemia
Gram stain
Grana
Grant, P. and Rosemary Grant
Granulocyte
One of the three types of leukocytes (white blood cells) that contain granules in their cytoplasm. Neutrophils, eosinophils, and basophils are the granulocytes. [More]
Granulocyte colony-stimulating factor (G-CSF)
Granzymes
Grassland biome
Graves' disease
Also called thyrotoxicosis. [More]
Gravitropism
[mechanism]
Gray (Gy)
Gray crescent
Green algae
Green fluorescent protein (GFP)
Greenhouse effect
Griffith, F.
Growth
Increase in the size of an organism, resulting from an increase in its number of cells, their size, the amount of extracellular matrix, or all of these. [human growth hormone]
Guanine
Guillardia theta
Gustducin
Gymnosperms
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