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In genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) (sign: Δ) is a mutation (a genetic aberration) in which a part of a chromosome or a sequence of DNA is left out during DNA replication.
5 ημέρες πριν · A deletion, as related to genomics, is a type of mutation that involves the loss of one or more nucleotides from a segment of DNA. A deletion can involve the loss of any number of nucleotides, from a single nucleotide to an entire piece of a chromosome.
Definition. Deletion refers to a type of mutation where a segment of DNA is lost or removed from a chromosome. This can result in significant changes to gene function and expression, leading to inherited disorders or diseases.
Deletions involve the loss of DNA sequences. Phenotypic effects of deletions depend on the size and location of deleted sequences on the genome. For instance, deletions that span a...
a type of MUTATION in which genetic material is removed from chromosomes or other DNA molecules (see CHROMOSOMAL MUTATION, POINT MUTATION). The deletion can be as small as a single DNA base (which can cause a misreading of the base sequence during PROTEIN SYNTHESIS, see FRAMESHIFT) to a large tract of DNA containing many GENES.
The simplest, but perhaps most damaging, structural change is a deletion—the complete loss of a part of one chromosome. In a haploid cell this is lethal, because part of the essential genome is lost.
Deletion is a genetic mutation that can result in some seriously bad effects. During DNA replication, deletion is when a section of the DNA sequence is lost. Deletions can range from a single nucleotide to an entire section of a chromosome.
