GENETICS AND EVOLUTION
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A mutation in a liver cell produces liver cancer.
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Lateral gene transfer occurs that produces an organism that is less resistant to drought.
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A mutation in an egg cell causes a change in DNA that produces an organism that is more sensitive to sunlight.
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A mistake in DNA replication before meiosis produces an organism that is better able to outrun predators.
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Detailed explanation-1: -A population that is isolated in a remote environment is still able to experience genetic variation. How could genetic variation that contributes to evolution occur in such a population? A mistake in DNA replication before meiosis produces an organism that is better able to outrun predators.
Detailed explanation-2: -Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.
Detailed explanation-3: -Natural Selection, Genetic Drift, and Gene Flow Do Not Act in Isolation in Natural Populations. In natural populations, the mechanisms of evolution do not act in isolation.
Detailed explanation-4: -Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes.
Detailed explanation-5: -A genetically diverse population of individuals is more likely to survive than a population of individuals with similar genetic makeup. Variation allows some individuals within a population to adapt to the changing environment and natural selection allows the expression of those beneficial traits to persist.