If a mutation has a visible effect at 26°c, but no visible effect at 20°c, then 20°c is the _______ temperature and 26°c is the

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_______ temperature.

1 answer:

sineoko [7] · Answer 1 · 2024-03-07T20:09:15+03:00

The permissive temperature is 20°C, and the restrictive temperature is 26°C if a mutation has an obvious effect at 26°C but not at 20°C.

<h3>What do permitted and restricted temperatures mean in terms of mutation?</h3>

A mutation that, under some (permissive) environmental conditions, exhibits the wild-type phenotype and, under other (restrictive) conditions, exhibits the mutant phenotype.
Permissive temperature : This causes the cell or organism to survive, just as it would if it were a wild type strain.
The temperature at which the mutant phenotype is seen, in contrast, is the nonpermissive temperature or restrictive temperature.
Restrictive temperature : A temperature below which a heat-sensitive cell LINE cannot operate.
The physiological or behavioral reaction of an organism to varying thermal circumstances is known as temperature sensitivity.
A low degree of temperature sensitivity denotes that the response is minimal.
A high degree of temperature sensitivity says that a minor change in temperature results in a significant response.
When a gene is expressed above a specific temperature, temperature-sensitive mutants of the gene exhibit a substantial decrease in the quantity or activity of the gene product (nonpermissive temperature).

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