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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Unnatural and harmful
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Unnatural and always affect the organism
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Natural and produces genetic diversity
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Natural and always affect the organism
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Detailed explanation-1: -Mutations are changes in the genetic sequence, and they are a main cause of diversity among organisms.
Detailed explanation-2: -Most of the mutations that we think matter to evolution are “naturally-occurring.” For example, when a cell divides, it makes a copy of its DNA-and sometimes the copy is not quite perfect. That small difference from the original DNA sequence is a mutation. Spontaneous breakdown of DNA can also cause mutations.
Detailed explanation-3: -Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.
Detailed explanation-4: -If they occur in cells that make eggs or sperm, they can be inherited; if mutations occur in other types of cells, they are not inherited.