The codon TCA codes for serine in a gene. If a new mutation occurred the replaced the "A" with "T" resulting in the production of the same amino acid this mutation would be a mutation and its fate over many generations would most likely be determined by

The correct answer is "silent; codon usage".

Explanation:

Silent mutations are changes in the genome sequence that do not result in any observable change in the phenotype of the individual. A common silent mutation is the change of a nucleotide in a codon that results in another codon that is translated into the same amino acid. The fate of silent mutations over many generations is determined by the codon usage of the species. If the silent mutation results is a codon that is not normally used by the species, it is very likely that it will get lost over time.

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answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.