genetics
Branch of biology concerned with the study of heredity and variation of organisms; the genetic constitution of a single organism, species, or other taxonomic group.
Used in 4 profiles
Results for “genetics”
Ichthyological terms, not general ones.
cytogenetics
Branch of genetics biology concerned with cell structure and function, particularly that of chromosomes.
phylogenetics
The study of evolutionary relatedness among species or other groups of organisms. May be based on morphology, molecular data, or both.
Used in 3 profiles
courtship ritual
Complex, genetically-determined sequence of behaviour, usually employing a combination of visual, auditory and chemical stimuli taking place before spawning. Either or both sexes may be the protagonist.
Used in 2 profiles
hybrid
Organism resulting from a natural or artificial cross between genetically-unlike individuals.
Used in 36 profiles
chimaera
An organism, organ or body part containing genetic tissue of more than one type due to mutation, transplant, genetic engineering, etc.. Also spelled 'chimera'.
DNA
Abbreviation for deoxyribonucleic acid, a double-stranded, self-replicating genetic material comprised of a chain of nucleotides. Present in nearly all living organisms and is the main constituent of chromosomes. DNA segments containing genetic instructions are called genes and normally direct production and activity of RNA.
Used in 11 profiles
microsatellite
Section of DNA comprising very short nucleotide sequences repeated many times. Highly polymorphic and used as a marker to determine genetic diversity, identify important genetic traits, analyse relationships, etc..
outcrossing
A cross between relatively unrelated individuals; the introduction of unrelated genetic material into a breeding line. Often used to raise or maintain genetic diversity.
RNA
Abbreviation for ribonucleic acid, a single-stranded, self-replicating genetic material comprised of a chain of nucleotides. Present in nearly all living organisms, and replaces and performs the role of DNA in some viruses. Particularly important in protein synthesis and sometimes in transmission of genetic information.
biodiversity
The number, variety, and genetic variation of organisms found within a specified geographic region, both within and between species and ecosystems. Often used as a measure of overall ecosystem health.
Used in 16 profiles
clone
Specimen descended from and genetically identical to a single common ancestor with natural examples normally resulting from asexual reproductive events. Produced via parthenogenesis in some fishes.
ecophenotype
A phenotype resulting from environmental or ecological conditions rather than genetic inheritance.
F0
Not an official term in genetics, but often used in reference to the founder, or parental, generation in a line of captive-bred organisms. Also used in aquarium literature to refer to wild caught fishes or a pair or group of assumedly unrelated individuals being used for breeding purposes.
F1
Term used in the fields of genetics and selective breeding in reference to the first filial generation, i.e., hybrid offpsring, of a cross between two distinctly different parental lines. Often used in aquarium literature to refer to offspring of F0 parents whether of the same species or not.
phenotype
The observable physical and biochemical traits of an organism, such as its behaviour, external morphology, colour pattern, phenology, etc. Influenced by both genetic and environmental factors.
Used in 7 profiles
reproductive isolation
The inability of two or more groups of organisms to interbreed due to the existence of geographical, behavioral, physiological, or genetic barriers. These can be further separated into those being active pre- or post-copulation.
trait
Genetically determined characteristic or condition; distinguishing feature.
Used in 52 profiles
derived
Used in phylogenetics in reference to a character or character state not present in the ancestral form of a species; apomorphic.
Used in 190 profiles
derived trait
In phylogenetics, a trait present in an organism which was absent in the last common ancestor of the group being considered; an apomorphy. Also used to refer to traits present in the ancestral form that have subsequently been lost.