Category: CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR

Wings of insects and birds have become flat, large and stream lined, due to common requirement of flight. This is an example of (1) Convergent evolution (2) Parallel evolution (3) […]

Insect wing and bird wings are example of (1) Coevolution (2) Convergent evolution (3) Divergent evolution (4) Parallel evolution   The evolution of flight is one of nature’s most remarkable […]

In several populations, each of size N =20, if genetic drift results in a change in the relative frequencies of alleles, A. What is the rate of increase per generation […]

75. One hundred Independent populations of Drosophila are established with 10 individuals in each population, of which, one individual is of Aa genotype and the other nine are of AA […]

In very small populations, genetic variation is often lost through genetic drift. If the population size of a mammal on an isolated island is 50, what percentage of its genetic […]

From population dynamics point of view, what would be the effective population size of a population of 150 breeding females and 50 breeding males? (1) 200 (2) 100 (3) 150 […]

What will be the approximate effective population size in a panmicitic population of 240 with 200 females and 40 polygamous males? (1) 160 (2) 133 (3) 63 (4)67   Understanding […]

Effective population size for polygamous species having 40 males and 10 females would be (1) 40 (2) 32 (3) 20 (4) 10   Understanding Effective Population Size The effective population […]

The following statements describe the outcomes of genetic drift: A. Genetic drift can eliminate alleles. B. Genetic drift can be associated with population bottleneck. C. Genetic drift is not observed […]

Following are key points about the effect of genetic drift: A. Genetic drift is significant in small populations. B. Genetic drift can cause allele frequencies to change in a pre-directed […]