43 results found

Search Results for: lethal

Conditional-lethal mutant

Conditional-lethal mutant --> conditionally lethal mutant a viral mutant that can replicate under some (permissive)... Read More

Lethal

Lethal deadly, fatal. Origin: L. Lethalis, from lethum = death Of an instrument of certain death; deadly poisons; lethal... Read More

Lethal Gene

Any gene that has an effect that causes the death of the organism at any stage of life.A genes whose effect on the phenotype... Read More

Dominant lethal trait

Dominant lethal trait trait, expressed in the phenotype if present in the genotype, that precludes having descendants. All... Read More

Mutagen

Mutagen Definition What is a mutagen? A mutagen is a substance or agent that causes DNA impairment that results in the... Read More

Lethal mutation

Definition noun A type of mutation in which the effect(s) can result in the death or reduce significantly the expected... Read More

Codon

What does codon mean? A codon, in biology, is the basic genetic unit of life that acts as the template for the amino acid... Read More

Complete dominance

Complete Dominance Definition Genetics is the study of how traits are inherited by organisms and in what ways these... Read More

Lethal Allele

A type of genetic mutation that proves to be... Read More

Frameshift mutation

Define Frameshift Mutation What is a frameshift mutation? In biology, insertions or deletions of nucleotides in the coding... Read More

Mutation

Mutation is a permanent, heritable change in the nucleotide sequence or the process by which such a change occurs in a gene... Read More

Suppressor-sensitive mutant

suppressor-sensitive mutant A conditionally lethal, host range, bacteriophage mutant that produces nonsense codons and can... Read More

Obligate anaerobe

Definition noun An anaerobe that does not require oxygen and lives only in anaerobic environment. Supplement Exposure to... Read More

Pleiotropy

Pleiotropy Definition When one single gene starts affecting multiple traits of living organisms, this phenomenon is known... Read More

Polymorphism

Polymorphism Definition The occurrence of two or more different forms or morphs in the population of a species is referred... Read More

Anaerobic respiration

Anaerobic Respiration Definition What is anaerobic respiration? Anaerobic (cellular) respiration is a respiratory process... Read More

Incomplete dominance

Incomplete Dominance Definition After Gregor Mendel discovered inheritance laws, the term ''incomplete dominance'' was... Read More

Genetic diversity

Genetic Diversity Definition Each species is composed of individuals with their own set of genes. A gene is the inheritance... Read More

Natural reservoir

Definition noun A reservoir host harboring the pathogen but shows no ill effects and serves as a source of... Read More

Osteopetrosis

Definition noun, plural: osteopetroses A rare hereditary disorder in which the bones are becoming excessively dense, thick,... Read More

Denaturation

Denaturation Definition In biochemistry, denaturation is defined as a process in which a molecular structure deviates from... Read More

Monoploidy

Definition noun (genetics) The state of being monoploid, that is having one set of the chromosomes Supplement Ploidy refers... Read More

Nasopharynx

Definition noun, plural: nasopharynges or nasopharynxes (anatomy) The part of the pharynx extending from the posterior... Read More

Effect of Chemicals on Growth & Development in Organisms

Plants Plants require a large number of elements to function properly, mainly carbon, oxygen, and hydrogen, essentially... Read More

Chromosomes X and Y and Sex Determination

Reviewed by: Mary Anne Clark, Ph.D. In humans, the normal chromosome complement is 46, consisting of 22 pairs of... Read More

Scared to Death

Scared to Death: Self-Willed Death, or the Bone-Pointing Syndrome   by Patrick D Hahn   Accepted on: September 4,... Read More

Reservoir host

Definition noun A primary host that harbors the pathogen but shows no ill effects and serves as a source of... Read More

Monoploid

Definition noun (genetics, cell biology) A cell or an organism consisting of one set of chromosomes adjective Of, or... Read More

Ld

Ld (Science: abbreviation) lethal... Read More

Physiological adaptation

If we look over evolutionary history, we find that it’s neither the most genius and intelligent nor the strongest and the... Read More

Curarine

Definition noun (pharmacology) The alkaloid responsible for the poisonous effects of curare Supplement Curarine is an... Read More

Metastasis

metastasis 1. (Science: cell biology, oncology) The transfer of disease from one organ or part to another not directly... Read More

Gene evolutionarily conserved

Gene, evolutionarily conserved a gene that has remained essentially unchanged throughout evolution. Conservation of a gene... Read More

Anaerobic bacteria

Definition noun Bacteria that are capable of living in the absence of molecular oxygen. Supplement In general, these... Read More

Mutant

Definition noun, plural: mutants (1) An organism, gene, or chromosome that is different from the wild type by one or more... Read More

Obligate aerobe

Before we define obligate aerobes, let us first understand and define aerobic organisms. Aerobic organisms are those that... Read More

Arboreal

Arboreal Definition Arbor is a Latin word meaning "tree". Thus, arboreal means "related to or pertaining to trees". The... Read More

Diploid

Diploid Definition Let's first understand the meaning of the word - diploid. From the words ‘di’, meaning "two", and... Read More

Gene

A gene is the fundamental, physical, and functional unit of heredity. The genes make up the sequences of DNA (genotypes).... Read More

Clinical

Definition adjective (1) Of, pertaining to, relating to, or dealing with a (medical) clinic (2) Relating to or founded on... Read More