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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Frameshift Insertion
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Point
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Inversion
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Frameshift Deletion
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Detailed explanation-1: -A point mutation is where you change one base in the DNA to another. A missense mutation occurs when that point mutation causes a different amino acid to be placed from that codon. Because multiple codons code for the same amino acid, not all point mutations will cause a missense mutation.
Detailed explanation-2: -A substitution is a mutation that exchanges one base for another (i.e., a change in a single “chemical letter” such as switching an A to a G). Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.
Detailed explanation-3: -Mutations can be of many types, such as substitution, deletion, insertion, and translocation.
Detailed explanation-4: -In fact, the G-T mutation is the single most common mutation in human DNA. It occurs about once in every 10, 000 to 100, 000 base pairs–which doesn’t sound like a lot, until you consider that the human genome contains 3 billion base pairs.