GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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radiation changing the DNA sequence in skin cells
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a gamete with an extra chromosome forming
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tobacco smoke altering the genes in lung cells
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exposure to chemicals altering nerve cell function
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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. Somatic mutations occur in non-reproductive cells; they are passed to daughter cells during mitosis but not to 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.
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: -Germline mutations are changes to your DNA that you inherit from the egg and sperm cells during conception. Somatic mutations are changes to your DNA that happen after conception to cells other than the egg and sperm. Mutations can lead to genetic conditions that affect your health.