Previous years Questions of CSIR-UGC NET

 

1.    If plant with genotype AaBb is self-pollinated where the A and b are not linked, then the probability of getting AABB will be                                                          

a)    1/4                                            

b)    1/8

c)    1/16                                          

d)    1/2

2. During gamete formation alleles which do not undergo recombination segregates during     

a)    Meisosis-I                                           

b)    Meiosis-II

c)    Mitosis                                                

d)    Cleavage

3. Two different mutant of drosophila gives a black body color. When these mutants are crossed all progeny have wild type color. It means mutations are

a)    Co-dominant                                       

b)    Allelic

c)    Non allelic                                          

d)    Epistatic

4. Polygenic traits in crops can be identified by

a)    QTL mapping

b)    Cluster analysis

c)    Tandem array analysis

d)    Gene mapping

5.              A Neurospora Stp strain have start and stop growth behavior. The mutated gene was found to be on mitochondria. If male Neurospora having stp mutation is crossed with wild type female Neurospora. Phenotype of progenies will be  

a)    All start and stop mutant

b)    All wild type

c)    Majority of start and stop mutant

d)    Majority of wild type

6. Under which condition recombination between genes will occur during conjugation

a)    F⁺ x  F^-

b)    F⁺ x  Hfr^-

c)    F^- x  Ffr^-

^d)         F^- x  F^-

7. Inversion is leads to crossover suppression because

a)    When crossing over occur within an inversion loop, leads to deleted and duplicated crossover chromosomes and inviability of zygote carrying them

b)    No crossing over in the crossing over loop

c)    Crossing over leads to formation of all acentric chromosomes

d)    Segregation of chromosomes is not normal

8. Which of the following is not a co-dominant marker?

a)    RAPD

b)    RFLP

c)    SNP

d)    SMPLs

9. To determine variation in wing length of butterfly from five different places which would be best statistical test?

a)    Chi-square

b)    Student t-test

c)    F-test

d)    Regression analysis

10. In Sickle cell anemia the RBC are sickle celled due to

a)    Change in shape of hemoglobin in oxygen unbound form

b)    Change in shape of hemoglobin in oxygen bound form

c)    Loss of spectrin cytoskeleton protein

d)    Due to loss of ATP synthesis

Answer: 1-c, 2-a, 3-c, 4-a, 5-d, 6-c, 7-a, 8-a, 9-c, 10-1