What is one similarity between genetic drift and gene flow? (1 point)
• They both occur in a population by chance.
• They are both caused by the migration of species.
They both cause a change in the frequency of traits in a population.
They are both caused by natural disasters, such as hurricanes.
• They both occur in a population by chance.
The correct answer is: They both occur in a population by chance. Both genetic drift and gene flow are random processes that can influence the frequency of traits in a population.
To determine the correct answer, we can eliminate the options that are incorrect based on our understanding of genetic drift and gene flow.
Genetic drift refers to the random changes in allele frequencies within a population over time. It occurs due to chance events, such as random mating, genetic bottlenecks, or the founder effect. On the other hand, gene flow refers to the exchange of genes between populations as a result of migration. It occurs when individuals move from one population to another, bringing their genetic material with them.
Looking at the options:
- Option 1: "They both occur in a population by chance." This is correct. Both genetic drift and gene flow occur due to chance events, although the causes differ.
- Option 2: "They are both caused by the migration of species." This is incorrect. While gene flow is indeed caused by the migration of individuals between populations, genetic drift can occur even without migration.
- Option 3: "They both cause a change in the frequency of traits in a population." This is correct. Both genetic drift and gene flow can lead to changes in the frequency of genetic traits within a population.
- Option 4: "They are both caused by natural disasters, such as hurricanes." This is incorrect. Neither genetic drift nor gene flow are specifically caused by natural disasters.
Based on this analysis, the correct answer is: They both occur in a population by chance.