THE MOLECULAR BASIS OF INHERITANCE
DNA MAKES RNA MAKES PROTEIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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deletion mutation
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substitution/point mutation
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an insertion mutation
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segregation
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Detailed explanation-1: -A mutation is a change in a genetic sequence. Mutations include changes as small as the substitution of a single DNA building block, or nucleotide base, with another nucleotide base.
Detailed explanation-2: -A mutation is a permanent change in the sequence of bases in DNA. Mutations occur in the DNA through deletion, duplication, inversion, insertion, and translocation within the chromosome. Mutations can occur due to errors during DNA replication or by mutagens in the environment.
Detailed explanation-3: -But there is another kind of mutation in which bases are added or deleted. This is called a frameshift mutation. There are two types of frameshift mutations: In an insertion mutation, one or more extra DNA bases are added.
Detailed explanation-4: -Nucleotide excision repair is another pathway used to remove and replace damaged bases. Nucleotide excision repair detects and corrects types of damage that distort the DNA double helix.