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 […]
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CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Statement About Genetic Variation and Small Populations Is Incorrect
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Factor Has the Least Impact on Allele Frequencies in Small Populations? Understanding Evolutionary Forces
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Process Does Not Cause Microevolutionary Change? Understanding the Role of Random Mating
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Understanding Microevolution: What It Is and What It Is Not
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Inbreeding Coefficient for Sibling Marriages: Understanding Genetic Risk in Populations
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Why Lethal Mutations Persist: The Role of Mutation-Selection Balance in Population Genetics
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Factors Do Not Bring Variation in Populations? Understanding the Role of Random Mating
Which of the following DO NOT bring variation in population? (1) Random drift (2) Random matting (3) Mutation (4) Natural Selection Variation in a population is essential for […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Transovarial Transmission in Plant Pathogens: Will Host Plants Evolve Resistance or Susceptibility?
Transovarial transmission (TOT) is a widespread and efficient process through which pathogens of plants can be passed between generations of arthropod vectors. During evolution host plant will become (1) Resistance […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
What Happens When a Lethal Heterozygote Genotype Exists? The Fate of Allele Frequencies in a Population
In a population a single gene locus has two alleles ’A’ and ‘a’ with allele frequency of ‘a’= 0.3. If genotype ‘Aa’ is lethal and only individual with genotype ‘AA’ […]
