Match List-I with List-II. A. Gene pool B. Genetic drift C. Gene flow D. Gene frequency | I. Stable within a generation II. Change in gene frequency by chance III. Transfer of genes into or out of population IV. Total number of genes and their alleles
- A-III, B-II, C-I, D-IV
- A-IV, B-II, C-III, D-I
- A-I, B-II, C-III, D-IV
- A-II, B-III, C-IV, D-I
Define each term in your own words before reading List-II. Four definitions, four one-line answers:
Gene pool — every allele of every gene present in the whole population. It is a total, an inventory. That maps to IV, “total number of genes and their alleles”.
Genetic drift — allele frequencies shifting by pure chance, with no selective advantage involved, most visible in small populations. That is II.
Gene flow — alleles moving between populations by migration and interbreeding. “Transfer of genes into or out of population” is III, almost word for word.
Gene frequency — how common one allele is at a given moment. Under Hardy–Weinberg equilibrium it does not change from one generation to the next, so it is “stable within a generation”, which is I.
p² + 2pq + q² = 1
factors that disturb equilibrium:
gene flow, genetic drift, mutation,
genetic recombination, natural selection
- Cover List-II. Write your own definition of each of A, B, C and D in the margin.
- Now uncover List-II and find the description that matches each definition you wrote — not the other way round.
- A is an inventory of alleles → IV. B is chance → II. C is movement between populations → III. D is a value that holds steady → I.
- A-IV, B-II, C-III, D-I. Notice that the wrong answer chosen was the sequential A-I, B-II, C-III, D-IV option — the same option that was wrongly chosen in Chemistry Q84 on this paper.
Each term defined independently, then matched.