Scelta multipla
Over short time periods, what would you expect to be responsible for creating the most genetic variation in humans?
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22. Evolution of Populations
Genetic Variation
Scelta multipla
Which of the following is not a source of genetic variation?
A
Gene flow
B
Natural selection
C
Genetic recombination
D
Mutations
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Understand the concept of genetic variation: Genetic variation refers to the differences in DNA sequences among individuals within a population. It is crucial for evolution and adaptation.
Identify sources of genetic variation: Common sources include mutations, genetic recombination, and gene flow. Each of these contributes to the diversity of genetic material in a population.
Explain mutations: Mutations are changes in the DNA sequence that can introduce new genetic variations. They occur randomly and can be beneficial, neutral, or harmful.
Describe genetic recombination: Genetic recombination occurs during meiosis when homologous chromosomes exchange genetic material, leading to new combinations of genes in offspring.
Clarify gene flow: Gene flow is the transfer of genetic material between populations, which can introduce new genetic variations into a population. Natural selection, however, is a process that acts on existing genetic variation rather than creating it.
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