Match column I with column II and select the correct option from the codes given below.
`{:("Column I","Column II"),("Mutation",(i)"Changes in population's frequencies due to chance alone"),("Gene flow",(ii)"Differences in survival and reproduction among variant individuals"),("Natural selection",(iii)"Immigration, emigration change allele frequencies"),("Genetic drift",(iv)"Source of new alleles"):}`

Options

A. I,ii,iii,iv
B. iv,ii,iii,i
C. v,I,iv,ii
D. iv,iii,ii,i

Answer

To solve the problem of matching Column I with Column II, we will analyze each term in Column I and find its corresponding definition in Column II.

### Step-by-Step Solution:

1. **Identify the first term: Mutation**
- **Explanation**: Mutation refers to changes in the DNA sequence, which can lead to the creation of new alleles. This is a source of genetic variation.
- **Match**: (iv) "Source of new alleles"

2. **Identify the second term: Gene flow**
- **Explanation**: Gene flow occurs when individuals move into or out of a population (immigration and emigration), which alters the allele frequencies within that population.
- **Match**: (iii) "Immigration, emigration change allele frequencies"

3. **Identify the third term: Natural selection**
- **Explanation**: Natural selection is the process where individuals with advantageous traits have higher survival and reproductive success, leading to changes in allele frequencies over generations.
- **Match**: (ii) "Differences in survival and reproduction among variant individuals"

4. **Identify the fourth term: Genetic drift**
- **Explanation**: Genetic drift is a random change in allele frequencies due to chance events, such as natural disasters or random mating, which can significantly affect small populations.
- **Match**: (i) "Changes in population's frequencies due to chance alone"

### Final Matching:
- Mutation → (iv) "Source of new alleles"
- Gene flow → (iii) "Immigration, emigration change allele frequencies"
- Natural selection → (ii) "Differences in survival and reproduction among variant individuals"
- Genetic drift → (i) "Changes in population's frequencies due to chance alone"

### Conclusion:
The correct matches are:
- Mutation (iv)
- Gene flow (iii)
- Natural selection (ii)
- Genetic drift (i)

Thus, the answer is option D, where all terms from Column I are correctly matched with their definitions in Column II.