HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Substitution
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Deletion
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Missense mutation-the codon TTT has a mistake in it
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Silent mutation-the second codon still codes for the amino acid PHE after the mutation. The protein is not affected
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Silent mutation-the second codon still codes for the amino acid LYS after the mutation. The protein is not affected
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Detailed explanation-1: -Mutations can be of many types, such as substitution, deletion, insertion, and translocation.
Detailed explanation-2: -Types of Mutations There are three types of DNA Mutations: base substitutions, deletions and insertions.
Detailed explanation-3: -A silent mutation is a type of substitution, or point, mutation, wherein the change in the DNA sequence of the gene has no effect on the amino acid sequence. For example, AAA (codes for the amino acid lysine, Lys) being mutated to AAG (which also codes for Lys).
Detailed explanation-4: -A frameshift variant occurs when there is an addition or loss of nucleotides that shifts the grouping and changes the code for all downstream amino acids. The resulting protein is usually nonfunctional. Insertions, deletions, and duplications can all be frameshift variants.