Hours & Admission Open every day except Tuesday. Following the terror attacks in Paris on November 13, 2015, the Louvre is strictly applying the security measures decided by the French authorities to ensure the safety of our visitors. It is strongly recommanded not to bring suitcases and luggage to the museum. Only luggage not exceeding 55 cm x 35 cm x 20 cm will be accepted.
deletion. 1  an act or instance of deleting. 2  the state of being deleted. 3  a deleted word, passage, etc. 4  Genetics. a type of chromosomal aberration in which a segment of the chromosome is removed or lost.
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 centromere result in an acentric chromosome that will most likely be lost during cell division. As with duplications, deletions can affect gene dosage and thus the resulting phenotype. Also, the larger the deletion, the more genes are likely to be involved, and the more drastic the resulting defect is likely to be.