60 results found

Search Results for: point mutation

Point mutation

Definition noun, plural: point mutations (genetics) A small-scale mutation characterized by a change of only one nucleotide... 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

Nonsense mutation

A nonsense mutation is the type of point mutation that renders the translation process useless by coding for a stop/nonsense... Read More

Silent mutation

A mutation is a change in the nucleotide sequence of a gene or a chromosome. When there is only one nucleotide involved, it... 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

Neutral mutation

Neutral Mutation Definition What is a neutral mutation? Neutral mutations are the alterations in the DNA that are... 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

Substitution mutation

Definition noun, plural: substitution mutations (genetics) A small-scale mutation characterized by a substitution of one or... Read More

Lethal mutation

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

Small-scale mutation

Definition noun, plural: small-scale mutations (genetics) A type of mutation characterized by a change of one or few... Read More

Transversion

Definition noun, plural: transversions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Transition

Definition noun, plural: transitions (genetics) A small-scale mutation characterized by the replacement of a purine by... Read More

Genetic Mutations

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

Pleiotropy

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

Nucleotide deletion

Definition noun A deletion of a single nucleotide causing a shift in the reading frame of the codons in the mRNA, thus, may... Read More

Cytosine

Definition noun plural: cytosines cy·to·sine, ˈsaɪtəsiːn (biochemistry) A pyrimidine nucleobase that complementary... Read More

Base pair substitution

Definition noun, plural: base pair substitutions A type of mutation involving replacement or substitution of a single... 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

Thymine

Definition noun plural: thymines thy·mine, ˈθaɪmɪn (biochemistry) A pyrimidine nucleobase in the DNA molecule that... Read More

Isoenzyme

Isozymes (also known as isoenzymes) are enzymes that differ in amino acid sequence but catalyze the same chemical reaction.... Read More

Deoxyribonucleic acid

Deoxyribonucleic Acid (DNA) Definition A nucleic acid refers to any of the group of complex compounds made up of linear... Read More

Transition mutation

transition mutation A point mutation involving substitution of one base-pair for another, i.e., replacement of one purine... 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

Chromosomal inversion

Definition noun, plural: chromosomal inversions A chromosomal aberration wherein a segment of a chromosome is reversed... Read More

Evolution

Evolution Definition Evolution is defined as a change in the genetic composition of a population over successive... Read More

Sickle cell anaemia

Definition noun A hereditary blood disorder resulting in anaemia due to a mutation in the allele coding for the beta chain... Read More

Nucleobase

Definition noun plural: nucleobases (biochemistry) The base in the nucleic acid, e.g. purines and pyrimidines Details ... Read More

Pyrimidine

Definition noun plural: pyrimidines py·rim·i·dine, py·rim·i·dine A heterocyclic aromatic compound that presents as... Read More

Uracil

Definition noun plural: uracils u·ra·cil, ˈjʊərəsɪl (biochemistry) A pyrimidine nucleobase in RNA that... Read More

Galactose

Definition noun plural: galactoses ga·lac·tose, ɡəˈlæktəʊz An aldohexose monosaccharide (chemical formula:... Read More

Axon hillock

Axon Hillock Definition What is axon hillock? If you are familiar with the different parts of the neuron, the axon hillock... Read More

Carrying capacity

Carrying Capacity Definition What is carrying capacity? In biology and environmental science, the carrying capacity of a... Read More

Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory... Read More

Pericentric inversion

Definition noun, plural: pericentric inversions (genetics) An inversion of a segment of chromosome in which the centromere... Read More

Uridine triphosphate

Definition noun plural: uridine triphosphates (biochemistry) A nucleotide composed of uracil, ribose and three phosphate... Read More

Uridine monophosphate

Definition noun plural: uridine monophosphates (biochemistry) A nucleotide composed of uracil, ribose and a phosphate... Read More

Thymidine triphosphate

Definition noun plural: thymidine triphosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and three... Read More

Thymidine diphosphate

Definition noun plural: thymidine diphosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and two... Read More

Thymidine monophosphate

Definition noun plural: thymidine monophosphates (biochemistry) A nucleotide composed of thymine, deoxyribose and a... Read More