GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of these best describes the initial change caused by a DNA mutation?
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a change in the sequence of base pairs
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a change in the production of enzymes
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a change in the number of nucleosomes within a cell
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a change in the number of hydrogen bonds between the bases
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Explanation:
Detailed explanation-1: -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).
Detailed explanation-2: -A mutation (Section 14.1) is a change in the nucleotide sequence of a short region of a genome (Figure 14.1A). Many mutations are point mutations that replace one nucleotide with another; others involve insertion or deletion of one or a few nucleotides.
Detailed explanation-3: -So, the correct answer is ‘Silent mutation’.
Detailed explanation-4: -Which of the following statements best describes the concept of DNA mutation? DNA mutation is an alteration in DNA replication that always results in phenotypic change.
There is 1 question to complete.