Viability

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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Viability

 

(1) The ability of an individual (or a population) to live and produce offspring. The viability of a population is determined by fertility, duration of the reproductive period, and the number of individuals that attain sexual maturity.

(2) The ability of an individual to survive until a specific moment of his life cycle—that is, until the beginning of the reproductive period. A measure of the viability of a mutant is the relative frequency of survival to that period in mutants as compared with nonmutated individuals.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
It has normal meiosis and produces a 1:1 ratio of female gametes with or without scs, and when crossed to the control or other durum lines produces plump and viable seed carrying scs, while those without scs are shriveled and inviable. Therefore, scs remains fixed in the male-sterile progeny from successive crosses with the control durum.
365-366), postzygotic isolation is measured as a discrete character that only assumes the values 0.00, 0.25, 0.50, 0.75, and 1.00:0.00 means that all hybrids were viable and fertile, while 1.00 means that both hybrid sexes in both reciprocal crosses were sterile or inviable. Prezygotic isolation, on the other hand, is measured as a continuous variable ranging between zero and one.
Michael Jones from the IDP group, agents for Barratt Homes, told councillors that including the affordable housing in the final phase of the development would result in "reduced profit making well below the industry norm", making the development inviable.
Sin embargo, dejando aparte que se trate de un mero cambio de rotulo, esta mezcla es inviable, pues los principios de que derivan cada una de ellas son radicalmente incompatibles.
We have an EP, There Is A World Outside, coming out in April on Commercially Inviable Records.
The traffic position and general conditions were bad enough 23 years ago, but the vast increase in the volume of traffic along Pershore Road, Bristol Road and Belgrave Road and many others since then - particularly at rush hours - makes the event completely inviable. The race must not be allowed to go ahead.
Mr Beith added that the government had made many small post offices inviable by transferring benefit payments to banks, and making it difficult and complicated for people to get pensions and other benefits over the post office counter.
The company has insisted managers, employees and unions had worked together to maximise investment, productivity and improvements, but said production was ``uneconomic and inviable''.
It pleaded that upgrading some exchanges was commercially inviable, and launched a registration scheme - if enough people registered a genuine interest, it would upgrade the exchange.