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

  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 […]

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 […]

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’ […]

When an allele changes frequency not because it itself is under natural selection, but because it is near another gene that is undergoing a selective sweep and that is on […]

The phenomenon of the non-random association of alleles at different loci in a given population, where the frequency of association of their different alleles is higher or lower than what […]

Fruit colour of wild Solanum nigrum is controlled by two alleles of a gene (A and a). The frequency of A, p=O.8 and a, q=O.2. In a neighbouring field a […]

Colour blindness affects approximately 1 in 12 men (8%). In a population that is in Hardy-Weinberg Equilibrium (HWE) where 8% of men are colour-blind due to a sex-linked recessive gene. […]

Sampling of 200 persons for their ABO blood group was done from an urban area. The types of blood group observed in the given population are as follows: A = […]

If a given gene in a randomly mating population has three alleles a, b and c in the ratio of 0.5, 0.2 and 0.3 respectively, what is the expected frequency […]

An autosomal recessive condition affects 1 newborn in 10,000 in a random mating population without any disruptive acting force. What is the approximate expected frequency of carriers in this population? […]