List of top Ecology and Evolution Questions on Population genetics asked in GATE EY

Which one of the following does not help maintain genetic diversity at a given locus?
A cross between a pure-bred plant with red flowers and a pure-bred plant with white flowers produced F1 generation with pink flowers. If the plants with pink flowers are selfed, what is the proportion of white : pink : red flowers expected in the next generation?
Which of the following is/are possible reason(s) for linkage disequilibrium between alleles at two loci?
The effective population size of a sexually reproducing, diploid, animal species will be highest when the sex ratio (number of reproducing males / number of reproducing females) is