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 […]
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CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How Much Genetic Variation Is Lost Each Generation in a Small Isolated Population?
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How to Calculate Effective Population Size: Example with 150 Breeding Females and 50 Breeding Males
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How to Calculate Effective Population Size in Panmictic Populations: Example with 200 Females and 40 Polygamous Males
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Calculating Effective Population Size in Polygamous Species: Example with 40 Males and 10 Females
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Genetic Drift Outcomes: Understanding the Correct Effects and Associations
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Genetic Drift: Identifying the True Effects on Populations
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 […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Genetic Drift: Understanding Its True Effects on Allele Frequencies and Genetic Variation
Which of the following statements is NOT correct regarding effect of genetic drift? (1) It alters allele frequency substantially only in small population. (2) It can cause allele frequencies to […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
Genetic Drift in Small Populations: Insights from Captive Breeding Experiments
Twenty small populations of a species, each polymorphic for a given locus (T, t) were bred in captivity. In 10 of them the population size was kept constant by random […]
CSIR NET Life Science Previous Year Questions and Solution on EVOLUTION AND BEHAVIOUR
How the Bottleneck Effect and Genetic Drift Led to Low Genetic Variation in Northern Elephant Seals
Northern elephant seal had been reduced to about 20 in 1800s. Biologist studied variation in protein in the species. They found no genetic differences in the protein among individuals. This […]
