Selection in which two extreme phenotypes leave more offspring than the intermediate phenotype is called (1) directional selection. (2) disruptive selection. (3) stabilizing selection. (4) neutral selection. Correct answer: (2) […]
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CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
How Stabilizing Selection Maintains Both Alleles in a Population
If natural selection favors an average phenotype by selecting against extreme variation, under such condition (1) Both alleles will coexist in population (2) Only dominant alleles will exist (3) Only […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Characteristics Are Incorrect for Hardy-Weinberg Equilibrium? Understanding Population Genetics Assumptions
A scientist is using the Hardy-Weinberg equation to assess if a population is in equilibrium or is evolving. She recorded the following characteristics for this population: A. The size of […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Heterozygote Advantage: How Both Alleles Persist in a Population
In a population individuals having heterozygous phenotype are more favored then homozygous dominant which are more favored then homozygous recessive genotypes, under such condition (1) Recessive alleles would be lost […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Factors Cause Changes in Allele Frequencies? Understanding Hardy-Weinberg Equilibrium Disruptions
The Hardy-Weinberg principle states that allele frequencies in a population will remain constant over generations if certain assumptions are met. A. Random mating B. Mate choice C. Small population size […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Types of Natural Selection in Drosophila: Stabilizing, Disruptive, and Directional Selection Explained
The body weight of adult female of a strain ofDrosophila is 1.8±0.45 mg (mean ± standard deviation).In a laboratory experiment, each of the 3 groups (A, B, C) of this strain […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Hardy-Weinberg Principle: When Will Allele Frequencies Remain Constant in a Population?
The Hardy-Weinberg principle comes from considering what happens when Mendelian genes act on population. The model predicts that there will be no change in allele frequencies when (1) Migration into […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Understanding Stabilizing Selection: How Natural Selection Narrows Variation in Drosophila Body Size
The mean (µ) and standard deviation (σ) of body size in a Drosophila population are 8.5 and 2.2 mm, respectively. Under natural selection over many generations the µ and σ […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Which Assumption Supports Hardy-Weinberg Equilibrium? Understanding the Role of Random Mating
Which of the following assumption support the Hardy-Weinberg Equilibrium? (1) Presence of Natural Selection (2) Random mating. (3) Genetic Drift. (4) Assortative mating Which Assumption Supports Hardy-Weinberg Equilibrium? Understanding […]
CSIR NET Life Science Previous Year Questions and Solution on Emergence of Evolutionary Thoughts
Heterozygote Advantage: The Natural Selection Mechanism That Preserves Genetic Diversity
Under which condition of natural selection no allele would be lost when (1) Any one homozygote is favored (2) Both homozygote are favored (3) Heterozygote are favored (4) Heterozygote is […]
