Biotechnology and Genetics definitions beginning with N

Biotechnology and Genetics (4,851) : 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 # Definitions 1 - 20 of 117 beginning with N

naked bud - permalink - collapse

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A bud not protected by bud scales.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: accessory bud, apical dominance, axillary bud, bud sport, budding, indeterminate growth, latent bud, lateral bud, mixed bud, node, plumule, Runner, suckering, sympodial, terminal bud, turion

narrow-host-range plasmid - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

A plasmid that can replicate in one, or at most a few, different bacterial species.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: amplification, broad-host-range plasmid, curing, incompatibility group, IPTG, multi-copy, par gene, pBR322, Relaxed circle plasmid, Relaxed plasmid, Stringent plasmid, Tumor-inducing plasmid, tumour-inducing plasmid

narrow-sense heritability - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

The proportion of the phenotypic variance that is due to variation in breeding values; the proportion of the phenotypic variance that is due to additive genetic variance.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: additive genetic variance, breeding value, EBV, estimated breeding value, mid-parent value, non-additive genetic variation

National Institutes of Health (NIH) - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

A nonregulatory agency which has oversight of research activities that the agency funds.
Susan Allender-Hagedorn and Charles Hagedorn - Cite This Source - This Definition
Browse Related Terms: National Science Foundation (NSF), NIH, NSF

National Science Foundation (NSF) - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

A nonregulatory agency which has oversight of biotechnology research activities that the agency funds.
Susan Allender-Hagedorn and Charles Hagedorn - Cite This Source - This Definition
Browse Related Terms: National Institutes of Health (NIH), NIH, NSF

native protein - permalink - collapse

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The naturally occurring form of a protein.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: bacteriocin, casein, chimeric protein, denatured protein, enterotoxin, G protein, G-protein coupled receptor, heterologous protein, homomultimer, hypervariable segment, mycoprotein, pathogenesis related protein, PR protein, Protein kinase, temperature-sensitive protein

natural killer cell - permalink - collapse

All > Science > Biotechnology and Genetics > Stem Cell

A cell type of the immune system that destroys tumor cells and cells infected with some types of organisms.
The President's Council on Bioethics - Cite This Source - This Definition
Browse Related Terms: Cytokines, Immune-function assay, immune system, Immunodeficient, Immunogenic, interleukin, T cells, T lymphocyte, thymus, Tolerance induction

Also listed in

All > Medicine > Cancer

Natural selection - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

The concept developed by Charles Darwin that genes which produce characteristics that are more favorable in a particular environment will be more abundant in the next generation.
USDA CSREES - Cite This Source - This Definition
The differential survival and reproduction of organisms because of differences in characteristics that affect their ability to utilize environmental resources.
UN Food and Agriculture Organization - Cite This Source - This Definition
The differential survival and reproduc- tion of organisms with genetic characteristics that enable them to better utilize environmental resources.
Susan Allender-Hagedorn and Charles Hagedorn - Cite This Source - This Definition
Browse Related Terms: biopiracy, Evolution, farm animal genetic resources, genetic resources, International Treaty on Plant Genetic Resources for Food and Agriculture, International Undertaking on Plant Genetic Resources, management of farm animal genetic resources, productivity, utilization of farm animal genetic resources

necrosis - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Death of tissue evidenced by discolouration, dehydration and loss of organization.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: albinism, albino, variegation

Also listed in

All > Medicine > Cancer
All > Medicine > Cancer > Breast Cancer

negative autogenous regulation - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Inhibition of the expression of a gene or set of co-ordinately regulated genes by the product of the gene or the product of one of the genes. Synonym: negative self-regulation.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: acceptor control, allosteric control, autogenous control, gene regulation, negative self-regulation

negative control system - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

A mechanism by which a regulatory protein is required to turn off gene expression.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: attenuation, coordinate repression, operational definition, Operator, operon, positive control system, regulatory sequence, trans-acting factor

negative selection - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Selection against individuals possessing a certain character. Opposite: positive selection.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: clonal propagation, Clone, dimorphism, germplasm, mass selection, offspring, ramet, Species

negative self-regulation - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

See: negative autogenous regulation.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: acceptor control, allosteric control, autogenous control, gene regulation, negative autogenous regulation

nematode - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Slender, unsegmented worms, often parasitic. Also known as eelworm, especially when phytoparasitic.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: bio-ethics, helminth, high throughput screening, parasite, phytoparasite

neo-formation - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

See: organogenesis.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: direct embryogenesis, direct organogenesis, indirect organogenesis

neomycin phosphotransferase II - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

(Abbreviation: npt-II). An enzyme which detoxifies the antibiotic neomycin, used as a marker gene to select for successfully transformed cells in plant transgenesis. See: neo^r.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: ARMG, beta-Lactamase, cosmid, DNA transformation, kanr, neor, Selectable marker, Tetracycline

neoplasm - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Localized cell multiplication, forming a tumour. Generally the result of genetic transformation. Neoplasmic cells differ in structure and function from the original cell type.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: ex vivo gene therapy, immortalization, polyethylene glycol, reconstructed cell, Transformant, Transformation, Transformation efficiency, transformation efficiency or frequency, Transforming oncogene, Tumor virus, tumour virus

Also listed in

All > Medicine > Cancer

neor - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Neomycin-resistance gene. See: antibiotic resistance marker gene, neomycin phosphotransferase II, selectable marker.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: ARMG, beta-Lactamase, cosmid, DNA transformation, kanr, neomycin phosphotransferase II, Selectable marker, Tetracycline

neoteny - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

The retention of juvenile body characters in the adult state, or the occurrence of adult characters in the juvenile state.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: holometabolous, rejuvenation, transition stage

Nestin - permalink - collapse

All > Science > Biotechnology and Genetics > Stem Cell

An intermediate filament protein found in cells such as neural and pancreatic precursors.
DHHS - Cite This Source - This Definition
Browse Related Terms: Dendrite, Neurofilament (NF), Vimentin

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Biotechnology and Genetics (4,851) : 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 #