deleterious
61radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …
62pernicious — adjective Etymology: Middle English, from Anglo French, from Latin perniciosus, from pernicies destruction, from per + nec , nex violent death more at noxious Date: 15th century 1. highly injurious or destructive ; deadly 2. archaic wicked •… …
63Bituminous coal — is a relatively soft coal containing a tarlike substance called bitumen. It is of higher quality than lignite coal but poorer quality than anthracite coal. Bituminous coal is an organic sedimentary rock formed by diagenetic and submetamorphic… …
64Y chromosome — Human Y chromatid The Y chromosome is one of the two sex determining chromosomes in most mammals, including humans. In mammals, it contains the gene SRY, which triggers testis development if present. The human Y chromosome is composed of about 60 …
65Muller's ratchet — Illustration of chromosome crossover during genetic recombination In evolutionary genetics, Muller s ratchet (named after Hermann Joseph Muller, by analogy with a ratchet mechanism) is the process by which the genomes of an asexual population… …
66Mutational meltdown — refers to the process by which a small population accumulates harmful mutations, which leads to loss of fitness and decline of the population size, which may lead to further accumulation of deleterious mutations due to inbreeding depression. A… …
67German nuclear energy project — Germany nuclear energy project The German experimental nuclear pile at Haigerloch. Active …
68Mutation-selection balance — The mutation selection balance is a classic result in population genetics first derived in the 1920s by John Burdon Sanderson Haldane and R.A. Fisher. A genetic variant that is deleterious will not necessarily disappear immediately from a… …
69Caretaker gene — Changes in the genome that allow uncontrolled cell proliferation or cell immortality are responsible for cancer. It is believed that the major changes in the genome that lead to cancer arise from mutations in Tumor Suppressor Genes 1. In 1997,… …
70Superconducting Radio Frequency — (SRF) science and technology involves the application of electrical superconductors to radio frequency devices. The ultra low electrical loss of the superconductor yields RF resonators with extremely high quality factors, or Q . For example, it… …
