Dominant lethal
Dominant Lethal
Dominant lethal is a term used in genetics to describe a particular type of mutation that results in the death of an organism. The term "dominant" refers to the fact that only one copy of the mutated gene is needed for the lethal effect to occur. This is in contrast to recessive lethal mutations, which require two copies of the mutated gene.
Pronunciation: /dɒmɪnənt liːθ(ə)l/
Etymology: The term "dominant lethal" is derived from the Latin word "dominans" meaning "ruling" and the Latin word "lethalis" meaning "deadly".
Related Terms
- Dominant gene: A gene that is expressed in the phenotype of an organism, even if only one copy is present.
- Lethal gene: A gene that, when present in certain forms or combinations, leads to the death of the organism.
- Mutation: A change in the DNA sequence of a gene.
- Phenotype: The observable characteristics of an organism, determined by its genotype and its interaction with the environment.
- Genotype: The genetic makeup of an organism, consisting of both the genes that are expressed and those that are not.
- Recessive: A term used to describe a gene that is not expressed in the phenotype of an organism unless two copies are present.
See Also
External links
- Medical encyclopedia article on Dominant lethal
- Wikipedia's article - Dominant lethal
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