CARTA Glossary

Displaying 401 - 500 of 1205 defined words
Word Definition Related Vocabulary
Fixed Alleles

Replaced all other alleles in a population.

Flora

Microorganisms including bacteria, protozoa, and fungi that are found on or in specific areas of the body.

Folklore

Stories, sayings, dances, material culture, and other customs shared by a group of people.

Follicular phase

The first part of the menstrual cycle, including menstruation and the period prior to ovulation.

Fomite

An inanimate object or substance that is capable of transmitting infectious organisms from one individual to another.

Food abundance

A situation in which food is plentiful and easily available in a particular area, region, or society.

Footfall

The point in time when a foot (or hand in the forelimb) first touches the ground.

Footfall sequence

The distribution of footsteps, relative to one another; some gaits may be defined by footfall sequence.

Foraging

Searching for wild food or provisions as opposed to cultivating food crops or breeding livestock.

Fore limb

The front limbs and feet of a quadrupedal animal (also, the upper limbs/arms of a human).

Foregut fermentation

A digestive process in which plant materials are fermented in a specialized combination of stomach compartments together called the reticulorumen. In ruminants, the fermented cud of the reticulorumen is regurgitated and chewed again to further break down the plant material, a process called rumination. After rumination, the food and bacteria are finally digested in other stomach compartments, the omasum and abomsum (true stomach). Foregut fermentation also exists in some species that do not ruminate, such as leaf monkeys (colobines).

Forkhead box P2 (FOXP2)

A gene in humans that encodes for a transcription factor protein and is involved in the production of speech.

Fos

A protein that is rapidly synthesized in neurons when they become active and therefore is used as a marker of neuron activity and is involved in regulating gene expression.

FOXP2 A gene in humans that encodes for a transcription factor protein and is involved in the production of speech.
Fragmented Maternal Care

A measure of abnormal mothering in rodents. Fragmentation score reflects disruptions in the temporal pattern of care typically displayed by rodents. High fragmentation scores indicate shorter nursing bouts and generally erratic behavior.

Freehand piercing

The act of piercing without the use of forceps.

Frontal lobe (brain)

The largest of the four major lobes of the brain in mammals, and is located at the front of each hemisphere. It is devoted to action such as skeletal movement, ocular movement, speech control, the expression of emotions. In humans, the largest part of the frontal lobe is the prefrontal cortex.

Frontoparietal Networks

Human frontal and parietal lobes form a network that is crucially involved in the selection of sensory contents by attention.

Frontotemporal dementia (FTD)

A group of progressive brain diseases characterized by degeneration of the frontal and/or temporal lobes of the brain, leading to changes in behavior, personality, language, and executive function. 

Functional DNA

Encodes biological information.
~2% of all DNA: Codes for proteins.
~80% of all DNA: Regulates gene activity.

Functional Magnetic Resonance Imaging (fMRI)

A neuroimaging technique for measuring and mapping brain activity that is noninvasive and safe. The phenomenon of nuclear magnetic resonance (NMR) is used to generate a signal that can be mapped and turned into an image of brain activity.

Funeral

Intentional, ritualistic disposal of the deceased. May include behaviors such as placement of grave goods (artefacts and/or natural materials such as flowers) and positioning of interred body(ies).

GABA receptors

A class of membrane proteins that act as receptors for the neurotransmitter GABA and are mostly found on inhibitory neurons.

Gait

How a person or animal moves; different categories of movement are different gaits (e.g. a run vs. a walk, a trot vs. a gallop).

Galago

A number of species of prosimians that are small, nocturnal, and native to continental Africa. Also known as bushbabies. Galagos often nest in tree hollows during the day. Chimpanzees have been observed hunting with “spears” for nested galagos, and they are also hunted by Hadza hunter-gatherers.

Gametes

Mature haploid sex cells that can unite to form a diploid zygote.

Gardnerella

A genus of Gram-variable-staining facultative anaerobic bacteria of which Gardnerella vaginalis is the only species.

Gardnerella vaginalis

A facultatively anaerobic Gram-variable rod that is involved, together with many other bacteria, in bacterial vaginosis in some women as a result of a disruption in the normal vaginal microflora.

Gastroenteritis

Inflammation of the stomach and small intestine typically caused by a virus, but can also be caused by bacteria, parasites, and fungi. Symptoms may include diarrhea, vomiting, and abdominal pain.

GATA binding protein 3 (GATA3)

A gene that encodes a protein in the GATA family of transcription factors. GATA3 plays an important role in endothelial cell biology and in allergy and immunity against worm infections. In humans, defects in GATA3 cause hypoparathyroidism with sensorineural deafness and renal dysplasia.

Gauge

1. A standard of dimensions or measurement – in body jewelry, the thickness. 2. Slang for the act of “stretching” a piercing.

Gauges

Slang term for body jewelry, especially plugs or tunnels worn in stretched ear piercings. 

Gauging

A slang term for stretching a piercing

Gene

A DNA sequence which encodes a specific function.

Gene conversion

A type of concerted evolution where one gene on a chromosome can “paste” its sequence over a neighboring gene of high sequence similarity such that the sequences become identical after the conversion event. This phenomenon is common between similar genes located on the same chromosome region.

Gene expression

The process by which the information contained within a gene (nucleotide sequence) is used to direct RNA and/or protein synthesis and dictate cell function. Nearly all of the cells in the body contain identical genes, but only a subset of this information is used or expressed at any time. The genes expressed in a cell determine what that cell can do.

Gene Flow

Movement of alleles between populations via mating.

Gene pool

The total of all genes and their variants (alleles) of a population of a species.

Gene regulation

Alterations of gene expression/activity.

Gene-Culture Co-Evolution Theory

A branch of theoretical population genetics that models the transmission of genes and cultural traits from one generation to the next, exploring how they interact. Also known as “biocultural evolution” or “biological enculturation” (feedback between culture and biology).

General anesthesia

A combination of medications that put you in a sleep-like state before medical procedures.

Genetic Adaptation

A biological characteristic with a heritable basis that improves reproduction and/or survival and results from evolution by natural selection.

Genetic diversity

The total of heritable traits within a species.

Genetic Drift

Change in allele frequencies, including fixation and loss, by chance.

Genetic load

The presence of deleterious gene variants (including recessive variants) in a population.

Genetic variant

A version of a DNA sequence that differs from others found at the same locus. For example, the difference can consist in a single base pair (as in single nucleotide polymorphisms, SNP) or in the deletion/insertion of a DNA base(s). See: indel.

Genetics

The study of genes and their inheritance.

Genital modification

The deliberate, permanent alteration of the male (penis, testicles) or female (vulva) genitals.

Genius

A person who is exceptionally intelligent or creative, either generally or in some particular respect.

Genome

The totality of DNA in a cell. Also refers to the DNA sequence that typifies an individual or species.

Genome Wide Association Study (GWAS)

An approach for “gene mapping” in which hundreds of thousands of SNPs are tested statistically for genetic associations with a phenotype.

Genomic Imprinting

Modification of the genome at the level of DNA (e.g. methylation) or its packaging into chromatin (histone tail modification via phosphorylation, acetylation, ubiquitination or glycosylation).

Genomics

The study of genome structure/function.

Genotype

The two alleles at one or more diploid loci.

Genotyping

Characterizing genetic variants at one or more loci.

Genus

A taxonomic rank used in biological classification of living and fossil organisms to group closely related species. In binomial nomenclature, the genus name plus species name forms the binomial species name (e.g. Homo sapiens).

Germinal Zone A region where cell division and proliferation occurs during vertebrate central nervous system development consisting of 2 layers lining the ventricles (ventricular zone and subventricular zone).
Glia (neuroglia)

Non-neuronal cells in the central nervous system and the peripheral nervous system that do not produce electrical impulses. Their function is to ensure homeostasis, form myelin sheaths, and provide support and protection for neurons. Glia make up ~50% of our brain cells.

Global Neuronal Workspace (GNW)

A hypothesis that offers a simple connectomic scheme based upon the contribution of neurons with long-range axons to conscious processing. Their reciprocal interactions contribute to the formation of a global workspace, broadcasting signals from the sensory periphery to the whole brain, thus yielding “conscious” experience. The GNW hypothesis privileges cortical pyramidal cells with long-range excitatory axons, particularly dense in prefrontal, temporoparietal, and cingulate regions, that, together with the relevant thalamocortical loops, reciprocally interconnect multiple specialized, automatic, and non-conscious processors. Another important feature of this hypothesis is that the GNW activates in a non-linear manner, called ‘‘ignition,’’ upon access to conscious processing. Ignition is characterized by the sudden, coherent, and exclusive activation of a subset of workspace neurons coding for the current conscious content, with the remainder of the workspace neurons being inhibited.

Global nitrogen cycle

The biogeochemical cycle by which nitrogen is converted by fixation (gaseous nitrogen is converted into ammonia, which can be taken up by plants), ammonification (organic nitrogen from decaying animal and plant matter is converted into ammonium by bacteria and fungi), nitrification (ammonium is converted into nitrate by soil bacteria), and denitrification (nitrate is reduced into gaseous nitrogen). This cycle is central to the biogeochemistry of the Earth. Oceans also have an enormous nitrogen cycle.

Glucocorticoids

A class of corticosteroids that are involved in stress response and are also a part of the feedback mechanism in the immune system. E.g., Dexamethasone (a synthetic glucorticoid).

Glycans

One of the four classes of major biomolecules. Glycans consist of varying numbers of sugars (monosaccharides) attached to proteins or lipids or secreted as free glycans. Glycans are essential biomolecules whose functions can be divided into three broad categories: structural and modulatory properties (including nutrient storage and sequestration), specific recognition by other molecules, and molecular mimicry of host glycans.

Glycolipid

A type of a lipid (fat) with an attached glycan that functions to maintain the stability of the cell membrane and to facilitate cellular recognition. Glycolipids are crucial in immune response and tissue formation.

Glycoprotein

A class of proteins with covalently attached glycans. Glycoproteins play a part in important cellular functions like embryonic development, cell-to-cell recognition, cell adhesion, and immune functions.

Glycosidic bond

A type of covalent bond that joins a carbohydrate to another molecule, which may be another carbohydrate or a different type of molecule.

Glycosylation

The process by which sugar molecules (glycans) are added to proteins, lipids, or other organic molecules. This post-translational modification plays a crucial role in the structure, stability, and function of many biomolecules.

Glycosyltransferases

Proteins with enzymatic functions that are involved in adding monosaccharides to other molecules.

Göbekli Tepe

An archeological site in Southeastern Turkey. Göbekli Tepe is a settlement dating to c. 9,500-8,000 BCE and is famous for its “monumental architecture” of large circular structures containing stone pillars (megaliths) decorated with reliefs. The structures were built by hunter-gatherers during the pre-pottery Neolithic and represent one of the first examples of monumental architecture.

Gram-Negative and Gram-Positive Staining

A characterization of bacteria based on how they differentially react with a chemical stain (crystal violet) based on their cell wall constituents.

Grandmother hypothesis

One of the explanations for the post-menopausal life stage of human females (and general long lives of humans), a life stage that does not exist in any non-human primate. It is hypothesized that the evolution of grandmothers is an advantage for humans. Grandmothers who invest energy into the offspring of their children reduce the reproductive cost of parenting through social kin-networking. This can further off-set the resource cost of childrearing and brain-building as parents are freed to provision for resources. An increase in resource procurement may reduce the inter-birth interval by allowing for earlier weening and more offspring production.

Gray Matter (Brain)

A major component of the central nervous system that includes regions of the brain involved in muscle control, sensory perception such as seeing and hearing, memory, emotions, speech, decision making, and self-control. Gray matter development peaks the third decade in humans.

Great apes

A taxonomic family denoting the extant chimpanzees, bonobos, gorillas, and orangutans. This is biologically invalid grouping given that chimpanzees and bonobos are more closely related to humans than to gorillas or orangutans.

Green Revolution

The development and dissemination of crop variants and technology between the 1950s and 1960s that increased agricultural production around the world. Also known as the third agricultural revolution.

Greenhouse effect

The entrapment of heat close to Earth’s surface by greenhouse gas emissions.

Greenhouse gas emissions

The release of polluting gasses resulting from human activity, such as burning fossil fuels that contribute to greenhouse effect.

Grey ceiling effect

The proposed boundary of maximum brain size in hominins that can be supported by an ape-like lifestyle that was crossed by genus Homo through the adoption of cooperative breeding. Described by Isler and van Schaik (2011).

Guillain–Barré Syndrome (GBS)

A rapid-onset muscle weakness caused by an autoimmune response in which the body’s immune system mistakenly attacks and damages the peripheral nervous system. Initial symptoms typically begin in the feet and hands with changes in sensation, pain, and muscle weakness, which then spreads to the arms and upper body of both sides. Sometimes this immune dysfunction is triggered by an infection or, less commonly by surgery, and rarely by vaccination.

Gut microbiome

The ecosystem of microbes that live in the intestines.

Gyrification

The process of forming the characteristic folds of the cerebral cortex.  The peak of such a fold is called a gyrus (plural: gyri), and its trough is called a sulcus (plural: sulci).

Gyrus (brain)

A ridge on the cerebral cortex that, along with surrounding sulci (furrows) creates the folded appearance of the brain in humans and other mammals.

Hadza hunter-gatherers

An indigenous ethnic group of traditionally nomadic hunter-gatherers from the central Rift Valley and Serengeti Plateau of Tanzania. Tourism, encroachment by pastoralists, and land rights disputes critically threaten their way of life.

Handaxe

A prehistoric stone tool with two faces and is usually made from flint, basalt, sandstone, quartzite, or chert.

Haplogroup

A set of similar haplotypes that share a common ancestor.

Haploid

One set of unpaired chromosomes.

Haplotype

A set of alleles along neighboring positions on a chromosome that are inherited together.

HapMap collection

A map of informative subsets of single nucleotide polymorphisms (SNPs) found along a stretch of a chromosome used to identify blocks of genetic variation existing along human chromosomes.

Haptic

Sensory perception and manipulation of objects through touch and proprioception.

Harbin cranium (Homo longi or “Dragon Man”)

A well-preserved Middle Pleistocene skull dated to approximately 146,000 years ago that was discovered near Harbin City, in Heilongjiang Province, northeastern China. It is large and robust, with a combination of archaic and modern human features. In 2021, researchers proposed that the Harbin cranium represents a new species, Homo longi (“Dragon Man”), which they argued might be a close sister group to modern humans. Others have classified it within the broader Homo heidelbergensis–Denisovan spectrum, seeing it as part of the archaic human diversity in Pleistocene East Asia.

The Harbin cranium was originally found in 1933 by a Chinese laborer working on the construction of a bridge, who hid the skull in a well to prevent it from being seized by occupying Japanese forces. Knowledge of the skull and its location was kept secret for decades until the worker’s family retrieved it shortly before his death. It was donated to the Hebei GEO University in 2018.

Health Disparity

Differences in the burden of disease, injury, violence, and health care as experienced by socially disadvantaged populations.

Hematopoietic stem cells

Stem cells that can become different types of blood cells.

Heme

An iron-containing molecular group found in proteins such as hemoglobin and myoglobin. Its iron atom can bind oxygen, allowing heme-containing proteins to transport or store oxygen and participate in other biological processes. In nutrition, heme iron refers to the form of dietary iron found primarily in animal tissues and is generally absorbed more efficiently than non-heme iron.

Heme iron

A form of dietary iron bound within heme groups, found primarily in animal tissues, particularly meat, poultry, and seafood. It is generally absorbed more efficiently and is less affected by other dietary factors than non-heme iron.

Hemideletion

One of two paired chromosomes is affected by a deletion. The other chromosome is intact. 

Hemoglobin

A protein complex within red blood cells (RBCs) that binds to oxygen molecules in the lungs for delivery to tissues throughout the body. The same complex also binds carbon dioxide (CO2) and carries it back to the lungs.

Hemoglobin S

The abnormal hemoglobin protein in red blood cells (RBCs) that causes RBCs to assume a sickle, or crescent shape.

Hemoglobin Subunit Beta Gene (HBB)

A gene that provides instructions for making beta-globin, a protein component of hemoglobin. Sickle Cell Anemia is a disorder caused by a mutation in the HBB gene.

Herd Immunity

Sometimes also called “herd protection” or “indirect immunity,” this is when most of a population is immune to a specific contagious disease, which slows its spread to others that are not immune. However, because the level needed to reach this kind of immunity is so high (about 80-90% of the population), it invariably means that a lot of individuals must be infected (and often can die) before herd immunity can be achieved.

Heritability

A statistic used in the fields of breeding and genetics that estimates the degree of variation in a phenotypic trait in a population that is due to genetic variation between individuals in that population.

Heterochromatin

Tightly wrapped and inactive chromatin.

Heterozygotes

Have two different alleles at a locus.

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