OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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only when the mutation is present during or occurs during mitosis
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only when the mutation is present during or occurs during meiosis
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when the mutation occurs during mitosis or meiosis
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when the mutation occurs in somatic cells
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Detailed explanation-1: -If a mutation occurs in a germ-line cell (one that will give rise to gametes, i.e., egg or sperm cells), then this mutation can be passed to an organism’s offspring. This means that every cell in the developing embryo will carry the mutation.
Detailed explanation-2: -Do Parents Pass Gene Mutations to Children? If a parent carries a gene mutation in their egg or sperm, it can pass to their child. These hereditary (or inherited) mutations are in almost every cell of the person’s body throughout their life.
Detailed explanation-3: -Chromosomal aberrations are larger-scale mutations that can occur during meiosis in unequal crossing over events, slippage during DNA recombination or due to the activities of transposable events. Genes and even whole chromosomes can be substituted, duplicated, or deleted due to these errors (Figure 1).
Detailed explanation-4: -Such mutations affect the individual carrying them but are not passed directly on to offspring. The only mutations that matter to large-scale evolution are those that can be passed on to offspring. These occur in reproductive cells like eggs and sperm and are called germ line mutations.