HEREDITY
MUTATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True
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False
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Detailed explanation-1: -A mutation is a random change in DNA which therefore affects a gene and/or chromosome . Most mutations have no effect on the phenotype. Some influence phenotype to some extent. Very few create a new phenotype.
Detailed explanation-2: -The majority of mutations have neither negative nor positive effects on the organism in which they occur. These mutations are called neutral mutations.
Detailed explanation-3: -No; only a small percentage of variants cause genetic disorders-most have no impact on health or development. For example, some variants alter a gene’s DNA sequence but do not change the function of the protein made from the gene.
Detailed explanation-4: -Silent mutations are mutations in DNA that do not have an observable effect on the organism’s phenotype. They are a specific type of neutral mutation.