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

Abrupt change in gene frequency of small population is termed as- (1) Genetic loss (2) Genetic erosion (3) Founders effect (4) Genetic load Founder Effect: The Abrupt Change in Gene […]

Consider an autosomal locus with two alleles A1 and A2 at frequencies of 0.6 and 0.4 respectively. Each generation, A1 mutates to A2 at a rate of µ = 1 […]

In a plant species, a segregating line (one that contains both homozygotes and heterozygotes at a locus) can be made homozygous by repeated selfing for several generations. What is the […]

The frequencies of two alleles p and q for a gene locus in a population at Hardy-Weinberg equilibrium are 0.3 and 0.7, respectively. After a few generations of inbreeding, the […]

Which one of the following statements is INCORRECT? (1) Loss of genetic variation occurs within a small population due to genetic drift. (2) The number of deleterious alleles present in […]

Which one of the following will have the least impact on allele frequencies in small populations? (1) Inbreeding (2) Random mating (3) Genetic drift (4) Outbreeding   Evolutionary Forces in […]

Which one of the following does NOT contribute to micro-evolutionary change? (1) Mutation (2) Random mating (3) Genetic drift (4) Natural selection   Microevolution refers to small-scale changes in allele […]

Micro-evolution is the term used for changes in allele frequencies that occur over time. A) Within a population at species level B) within a community at genus level C) due […]

The inbreeding coefficient of offspring on marriage between brother and sister siblings will be (1) 0.5 (2) 0.05 (3) 0.25 (4) 0.75   What Is the Inbreeding Coefficient? The inbreeding […]

Small amount of lethal mutation always tend to remain in population is due to (1) Mutation-Selection balance (2) Frequency dependent selection (3) Positive selection (4) Negative selection   Why Do […]