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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change in nitrogenous bases of a sperm or egg cell
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change in shape of muscle cell
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change in nitrogenous base of a skin cell
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mutations cannot be passed on to offspring
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Detailed explanation-1: -Germ-line mutations occur in reproductive cells (sperm or eggs) and are passed to an organism’s offspring during sexual reproduction.
Detailed explanation-2: -A gene change in a body’s reproductive cell (egg or sperm) that becomes incorporated into the DNA of every cell in the body of the offspring. Germline mutations are passed on from parents to offspring. Also called germline variant.
Detailed explanation-3: -Germline mutations occur in gametes. These mutations are especially significant because they can be transmitted to offspring and every cell in the offspring will have the mutation.
Detailed explanation-4: -A point mutation-the change of a single nitrogen base in a DNA sequence-is usually the least harmful type of DNA mutation. Codons are a sequence of three nitrogen bases in a row that are “read” by messenger RNA during transcription.
Detailed explanation-5: -Some mutations are hereditary because they are passed down to an offspring from a parent carrying a mutation through the germ line, meaning through an egg or sperm cell carrying the mutation. There are also nonhereditary mutations that occur in cells outside of the germ line, which are called somatic mutations.