The correct answer is Option (4 )- A-iv, B-iii, C-ii, D-i
| COLUMN 1 |
COLUMN 2
|
| A. Mutation |
iv. Source of new alleles |
| B. Gene flow |
iii. Immigration, emigration change allele frequencies |
| C. Natural selection |
ii. Differences in survival and reproduction among variant individuals |
| D. Genetic drift |
i. Changes in population's frequencies due to chance alone |
A. Mutation → iv. Source of new alleles
Explanation: A mutation is a change in the DNA sequence that can introduce new alleles into a population. It is the primary source of genetic variation, which can lead to the evolution of new traits.
B. Gene flow → iii. Immigration, emigration change allele frequencies
Explanation: Gene flow is the movement of alleles between populations through immigration and emigration. This can change the allele frequencies in both the source and recipient populations.
C. Natural selection → ii. Differences in survival and reproduction among variant individuals
Explanation: Natural selection is the process where individuals with certain heritable traits survive and reproduce more successfully than others, leading to changes in allele frequencies over time.
D. Genetic drift → i. Changes in population's frequencies due to chance alone
Explanation: Genetic drift refers to random changes in allele frequencies in a population, particularly in small populations. It occurs due to chance events, not natural selection.
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