Q.A population will not exist in Hardy-Weinberg equilibrium if [AIPMT-2015] a) Individuals mate selectively b) There are no mutations c) There is no migration d) The population is large

Step 1. Hardy–Weinberg equilibrium requires five simultaneous conditions: no mutation, random mating, no gene flow, an effectively infinite population size, and no natural selection.

Step 2. 'Individuals mate selectively' directly violates the random-mating condition, since selective (non-random) mating changes which genotype combinations actually occur in the next generation, disturbing the expected p²:2pq:q² ratio. …

Check each option against the five Hardy–Weinberg assumptions and identify the one option that is a …

• Selecting 'the population is large', which is actually one of the REQUIRED conditions for equilibrium, not a disturbance of it. …