THE MOLECULAR BASIS OF INHERITANCE
GENE MUTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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is when a nucleotide is replaced with a different nucleotide resulting in a different amino acid.
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is when a nucleotide is replaced with a different nucleotide resulting in the same amino acid.
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Requires the reading frame to change, which causes all of the amino acids after the mutation to change.
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Detailed explanation-1: -In a silent mutation, a nucleotide is substituted but the same amino acid is produced anyway. This can occur because multiple codons can code for the same amino acid. For example, AAG and AAA both code for lysine, so if the G is changed to an A, the same amino acid will form and the protein will not be affected.
Detailed explanation-2: -(poynt myoo-TAY-shun) A genetic alteration caused by the substitution of a single nucleotide for another nucleotide.
Detailed explanation-3: -Substitution, as related to genomics, is a type of mutation in which one nucleotide is replaced by a different nucleotide. The term can also refer to the replacement of one amino acid in a protein with a different amino acid.
Detailed explanation-4: -A point mutation is a genetic mutation where a single nucleotide base is changed, inserted or deleted from a DNA or RNA sequence of an organism’s genome. Point mutations have a variety of effects on the downstream protein product-consequences that are moderately predictable based upon the specifics of the mutation.