ratchet$66828$ - meaning and definition. What is ratchet$66828$
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What (who) is ratchet$66828$ - definition

IRREVERSIBLE ACCUMULATION OF DELETERIOUS MUTATIONS IN THE ABSENCE OF GENETIC RECOMBINATION
Muller’s ratchet; Mullers ratchet; Muller ratchet; Muller's Ratchet; Müller’s ratchet
  • Illustration of chromosome crossover during genetic recombination

Double Ratchet Algorithm         
  • A mechanical ratchet
CRYPTOGRAPHIC KEY MANAGEMENT ALGORITHM
Axolotl ratchet; Double ratchet; Double Ratchet algorithm; Double ratchet algorithm; Ratchet (cryptography)
In cryptography, the Double Ratchet Algorithm (previously referred to as the Axolotl Ratchet) is a key management algorithm that was developed by Trevor Perrin and Moxie Marlinspike in 2013. It can be used as part of a cryptographic protocol to provide end-to-end encryption for instant messaging.
ratchet-wheel         
MECHANICAL DEVICE THAT ALLOWS CONTINUOUS LINEAR OR ROTARY MOTION IN ONLY ONE DIRECTION
Ratchet-wheel; Ratchet and pawl; Rachet; Ratchet mechanism; Ratchet teeth
n.
(Mach) Ratchet.
Ratchet (device)         
MECHANICAL DEVICE THAT ALLOWS CONTINUOUS LINEAR OR ROTARY MOTION IN ONLY ONE DIRECTION
Ratchet-wheel; Ratchet and pawl; Rachet; Ratchet mechanism; Ratchet teeth
A ratchet (occasionally spelled rachet) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction. Ratchets are widely used in machinery and tools.

Wikipedia

Muller's ratchet

In evolutionary genetics, Muller's ratchet (named after Hermann Joseph Muller, by analogy with a ratchet effect) is a process through which, in the absence of recombination (especially in an asexual population), an accumulation of irreversible deleterious mutations results. This happens due to the fact that in the absence of recombination, and assuming reverse mutations are rare, offspring bear at least as much mutational load as their parents. Muller proposed this mechanism as one reason why sexual reproduction may be favored over asexual reproduction, as sexual organisms benefit from recombination and consequent elimination of deleterious mutations. The negative effect of accumulating irreversible deleterious mutations may not be prevalent in organisms which, while they reproduce asexually, also undergo other forms of recombination. This effect has also been observed in those regions of the genomes of sexual organisms that do not undergo recombination.