cluster

Trans

...ing two mutant sites (ab) within a gene or gene cluster , the arrangement, Ab/aB. See cis conformation A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> The trans port protein s integrated into the cell membrane are often highly selective about the chemicals the...

Tetrad

...#62;> tetrad The four chromatid s in each cluster during synapsis ; formed by the two sister chromatids in each of the two homologous chromosomes . PICTURE ... Full article >>> tetrad A pair of homologous chromosomes during synapsis ( prophase I of meiosis ). A tetrad co...

Telophase

... Telophase A nuclear envelope reforms around each cluster of chromosomes and these return to their more extended form. Cytokinesis ... Full article >>> mitosis The multistep process ( interphase , prophase , metaphase , anaphase , telophase ) in eukaryotic cells that results in th...

Style

...the ovary but below the stigma . synangium -- A cluster of sporangia which have become fused in development. Full article >>> style Part of the female reproductive structure in the carpel of a þower; formed from the ovary wall. The tip of the style carries the stigma to whic...

Species

...icle >>> A species is the smallest cluster of organ isms that possesses at least one diagnostic character . This character may be morphological, biochemical or molecular and must be fixed in reproductively cohesive units. Full article >>> Sub species : a geographically de...

Sorus

...osby ... Full article >>> sorus A cluster of sporangia found on a fern leaf . sound window The use of frequencies for communication that are trans mitted through the environment with little loss of strength ( attenuation ). Full article >>> sorus (pl. sori) A group of sp...

Roots

...ft which develops into the root system. rosette. A cluster of leaves arranged in a compact circular pattern, often at a shoot tip or on a shortened stem . Full article >>> prop roots Adventitious roots arising on a stem above the ground and imparting some mechanical support to plan...

Photon

...n (the minimum unit of light) absorbed by a small cluster of adjacent rods is sufficient to send a signal to the brain. Full article >>> Radiation, such as X-rays and gamma rays (high energy photon s), that causes atoms to release electrons and become ions. A B C D E F G H I J K L M N O P Q ...

Operon

...62;> operon A genetic unit consisting of a cluster of genes under the control of other genes, found in prokaryotes . Full article >>> OPERON - A complete unit of bacteria l gene expression and regulation, including the structural gene or genes, regulator gene (s), and control ...

Nucleus

...ntaining organelle of a eukaryotic cell . (3) A cluster of neuron s. Full article >>> nucleus Cell nucleus ; a spheroid body within a cell , contained in a double membrane, the nuclear envelope, and containing chromosomes and one or more nucleoli . The genetic control center of a ...

Nephron

... the kidney . It is a tiny tubule consisting of a cluster of capillaries called the glomerulus , surrounded by a hollow bulb known as Bowman's capsule . Full article >>> Nephron s filter 125 ml of body fluid per minute; filtering the entire body fluid component 16 times each day. In a 24...

Mycelium

...y) of a fungus ; hyphae- pl. inflorescence -- A cluster of flower s. internode -- The region of a stem between two nodes , when there is no branching of the vascular tissue . Full article >>>...

Minisatellite

...a variable number of tandem repeats that tend to cluster near the telomeric ends of chromosomes . The repeats often contain a repeat of 10 nucleotide s. They are used for genetic map ping. Cf. Full article >>> minisatellite , genetic marker , mobile element, transposon , short inters...

Lungs

...narrowed ending of bronchioles that opens into a cluster of alveoli . A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> The lungs are located inside the thoracic cavity , protected by the bony structure of the rib cage and enclosed by a double-walled sac called pl...

Lineage

...es are played out on an individual mammalian gene cluster during lineage commitment and differentiation Douglas R. Full article >>> In fact, it is widely accepted that eukaryotic metabolism is largely a derivative of bacteria l metabolism with mitochondria having descended from a ...

Life form

...rmation of biome s. central bud The main bud in a cluster located at one position. Full article >>> Without water, most life form s would be unable to sustain themselves and the Earth would be a barren, desert-like place. Although water temperatures can vary widely, aquatic areas tend to be ...

Invertebrates

...62;>> Most invertebrates have a single cluster of homeotic genes. In Drosophila that cluster is broken in two. Vertebrates have four copies of the cluster, strongly suggesting that the cluste...

Inner cell mass

...Full article >>> inner cell mass A cluster of cells in a mammalian blastocyst that protru... cells , and inside this hollow sphere, there is a cluster of cells called the inner cell mass . The cells of the inner cell mass will go on to form vir...

Inflorescence

inflorescence -- A cluster of flower s. ingestion -- The intake of water or ...ticle >>> inflorescence A flower cluster with a definite arrangement informal economy Small- scale family businesses in temporary location...

Haplotype

... refers to a collection of specific alleles in a cluster of tightly-linked genes. Full article >>> Search for haplotype in these other data bases too Definition of haplotype : ... Full article >>> Haplotype A set of closely linked genetic marker s present on one chrom...

Graafian follicle

...l article >>> Graafian follicle : a cluster of cells within the ovary that is derived from egg cells and secretes female hormones called estrogen s. Full article >>>...

Gene cluster

Related Terms: Gene cluster Term coined by Demerec & Hartman (1959) for a gro...ll article >>> The interleukin gene cluster on human chromosome 5q31 was selected for large scale sequencing because it contains a numb...

Eukaryotes

...NA sequence s, bacteria l or archaeal sequence s cluster in clade s that are otherwise strictly eukaryotic. Full article >>> 77-84 9 Nutrient-regulated gene expression in eukaryotes Richard J. Reece, Laila Beynon, Stacey Holden, Amanda D. Hughes, Karine RBora and Christopher A. Sellick....

Eukaryote

...NA sequence s, bacteria l or archaeal sequence s cluster in clade s that are otherwise strictly eukaryotic. Full article >>> 77-84 9 Nutrient-regulated gene expression in eukaryote s Richard J. Reece, Laila Beynon, Stacey Holden, Amanda D. Hughes, Karine RBora and Christopher A. Sellic...

Epigenetic

...es are played out on an individual mammalian gene cluster during lineage commitment and differentiation Douglas R. Full article >>> Understanding the role of epigenetic regulation, gene order , and in situ homology sequence searching will ultimately advance the practical applica...

Differentiation

...es are played out on an individual mammalian gene cluster during lineage commitment and differentiation Douglas R. Full article >>> Sxl directs somatic sexual development by controlling the dosage compensation system (Lucchesi, 1978) and the somatic sexual differentiation pathw...

Conformation

...ing two mutant sites (ab) within a gene or gene cluster , the arrangement, Ab/aB. See cis conformation A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> The mechanism is based on the prion hypothesis , which posits that self-perpetuating changes in the conformat...

Complete linkage

... >>> Complete linkage hierarchical cluster ana lysis identified clusters with constitutively expressed gene s, those that were anaerobic ally or aerobic ally induced with both Mn(IV) and Fe(III) serving as terminal electron acceptors, ... Full article >>>...

Colony

...probe . Full article >>> colony A cluster of genetically identical individuals formed asexual ly from a single colon izing individual. colostrum The first secretion of the mammary gland s following the birth of an infant. columella Central pillar in gastropod shell s. Full article ...

Colon

...or rock; see also pioneer organ ism. colon y A cluster of genetically identical individuals formed asexual ly from a single colon izing individual. Full article >>> 1 Colon iality in Chlorella vulgaris Boraas (1983) reported the induction of multicellularity in a strain of Chlorella ...

Chromomere

... chromosome ; may be identical with a gene or a cluster of genes. chromonema A convoluted thread in prophase of mitosis or the central thread in a chromosome . Full article >>> The chromosome strand s (20 nm diameter fibers consisting of two double strand s of DNA ) are dotted wit...

Chordate

...f frogs, of chickens, of human s-had a single Hox cluster with probably thirteen genes in them. Full article >>> : A major phylum in the Kingdom Animalia . A chordate is character ized by the presence of a dorsal notochord at some stage of development and a dorsal hollow nerv...

Chordates

...f frogs, of chickens, of human s-had a single Hox cluster with probably thirteen genes in them. Full article >>> deuterostome s - broad class ification of triploblastic animals including echinoderms and chordates that tend to share certain embryo logical trait s; among these the forma...

Centimorgans

...e proximal boundary of this segment is another cluster of eight loci that comprise 21 centimorgans of mouse chromosome 16. Full article >>> If one maps in small intervals from one end of a chromosome to the other, the total number of centimorgans often exceeds 100 (as you can s...

Centimorgan

...e proximal boundary of this segment is another cluster of eight loci that comprise 21 centimorgan s of mouse chromosome 16. Full article >>> The time of trans fer is a measure of distance of bacteria l genes from the origin and from one another. Distances on maps of bacteria...

Bronchioles

...narrowed ending of bronchioles that opens into a cluster of alveoli . A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> In mammals the paired lungs are each supplied by a bronchus that divides, treelike, into bronchioles . Each bronchi ole ends in an atrium fr...

ATP

.... Full article >>> ATP synthase A cluster of several membrane proteins found in the mitochondria l cristae (and bacteria l plasma membrane ) that function in chemiosmosis with adjacent electron transport chain s, ... Full article >>> ATP synthase A membrane-bound ...

AP-1

...g site s in the 1 Mb well-annotated cytokine gene cluster (Hs5q31; Mm11). Full article >>> Frequently, extracellular signals induce the expression of immediate early genes (IEGs) such as c-fos, c-jun, or AP-1 . These are in and of themselves transcription factor s or components thereof, ...

Alveoli

...narrowed ending of bronchioles that opens into a cluster of alveoli . A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ... Full article >>> In mammals the paired lungs are each supplied by a bronchus that divides, treelike, into bronchioles . Each bronchi ole ends in an atrium fr...

Aerobe

...ht have aerobic bacteria on the surface of the cluster and in the core, we can find bacteria that are strictly anaerobic , that actually can't live in the presence of oxygen . They're coexisting because the aerobe s ... Full article >>> Metabolic rate. The overall rate of biochemical...