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There are 5 different disorders that result in galactosemia differentiated into three main types. The worst is the Classic form and there are over 180 different mutations associated with this form.

The GALT gene is modified by substitution is these examples.

The most common one in Caucasian is a single substitution of arginine for glutamine at position 188 on the protein.

Another mutation that occurs almost exclusively in individuals of African decent is

a single substitution of leucine for serine at position 135.

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Which is not a frameshift mutation substitution insertion deletion or point mutation?

A point mutation is not a frameshift mutation. Point mutations involve changes in a single nucleotide base, while frameshift mutations involve the insertion or deletion of nucleotide bases, causing a shift in the reading frame of the genetic code.


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From another angle: beneficial and detrimental.


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A point mutation is never a frameshift mutation because it involves the substitution of a single nucleotide for another rather than the insertion or deletion of nucleotides that would disrupt the reading frame of a gene.


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What would produce a frameshift mutation?

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Why is a frameshift mutation more damaging than a substitution?

A frameshift mutation alters the reading frame of the genetic code, causing all amino acids downstream of the mutation to be incorrect. This can lead to a nonfunctional or drastically altered protein. A substitution mutation only changes one amino acid, which may have a milder effect on protein function.


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What mutation can change every amino acid that follows the point of mutation?

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