31 results found

Search Results for: mutant

Mutant

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

Conditional-lethal mutant

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

Deficiency mutant

Deficiency mutant --> auxotrophic mutant mutant with a nutritional requirement not present in the wild type... Read More

Inactive mutant

Inactive mutant a mutant that is not phenotypically manifest. Synonym: silent... Read More

Constitutive mutant

Definition noun A mutant organism that continuously produces a protein (and therefore may be produced in excess) due to a... Read More

Suppressor-sensitive mutant

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

Cis trans test

Cis trans test (Science: molecular biology) The complementation test with two or more interacting genes placed in cis and... Read More

Lethal mutation

Lethal Mutation Definition Genetic mutations come from changes in the DNA structure or sequencing in an organism. Often... 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

Plant sets off “SOS” for plant defense when it gets hurt

When herbivore, such as an insect, nibbles a plant leaf, the plant sets off an "SOS" or distress signal as one of the... Read More

Neutral theory of molecular evolution

Definition noun A theory stating that evolutionary changes particularly at the molecular level arise from genetic drift of... Read More

Genetic variation

Definition noun, plural: genetic variations Variations of genomes between members of species, or between groups of species... Read More

Mosaicism

Cells often go through many divisions before they become a part of an organism’s genetic make-up. This leaves room for... Read More

Allele

Allele Definition What are alleles? An allele is a term coined to describe a specific copy of a gene. Genes, the DNA... Read More

Defective bacteriophage

Defective bacteriophage a temperate bacteriophage mutant whose genome does not contain all of the normal components and... 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

Pawn

pawn mutant of Paramoecium that, like the chess piece, can only move forward and is unable to reverse to escape noxious... Read More

Genetic Information and Protein Synthesis

Genetic Code Genes are sequences of DNA nucleotides that carry and transmit the information specifying amino acid sequences... Read More

Trehalose

Definition noun plural: trehaloses tre·ha·lose, loʊs A disaccharide made up of two α-glucose molecules, and serves as... Read More

Variation

Reviewed by: Mary Anne Clark, PhD Definition noun, plural: variations A difference or deviation (e.g. in... Read More

DNA polymerase II

Definition noun A DNA polymerase involved in DNA replication in prokaryotes, is encoded by polB gene, and composed of 783... Read More

Bithorax

Definition noun A homeotic gene first described in Drosophila that controls the development of the third thoracic segment... Read More

Cell cycle

Definition noun (cell biology) The sequence of growth and division of a cell, and consists of a series of biological... Read More

Wild type

Definition noun (1) The typical (or the most common) form, appearance or strain existing in the wild. (2) The normal,... Read More

Cell division

Definition noun, plural: cell divisions The process in which the parent cell divides, eventually giving rise to new daughter... 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

Disjunction

Definition noun The normal separation or moving apart of chromosomes toward opposite poles of the cell during cell... Read More

Temperate phage

Definition noun, plural: temperate phages A bacteriophage that displays lysogenic life cycle in contrast to virulent phage... Read More

Revertant

revertant In microbial genetics, a mutant that has reverted to its former genotype (true reversion) or to the original... Read More

Missense mutation

What is a missense mutation? Literally speaking, a mutation that changes the meaning of the encoded gene sequence is the... Read More

Genetic Mutations

Reviewed by: Mary Anne Clark, Ph.D. Genetic Mutations Genetic mutations are inherited variations in an... Read More