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Effects
of
Mutations
on
the
Phenotype -
According to their effects on the phenotype mutations may be classified as lethals, sub vitals and super vitals.
Lethal mutations result in the death of the cells or organisms in which they occur. Sub vital mutations reduce the chances of survival of the organism in which they are found.
Super vital mutations on the other hand may result in the improvement of biological fitness under certain conditions. There may also be mutations which are neither harmful nor beneficial to the organism in which they occur.
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