The previous years question paper of the Rajasthan Pre Medical Test which is required for reference purpose is as given below:


01. Unlinked genes show recombination frequency of
(1) 100%
(2) 0%
(3) 50%
(4) 10-30%

02. Presence of heterochromatin ...... the frequency of crossing over
(1) Increases
(2) Decreases
(3) does not effect
(4) Is directly related to

03. First linkage maps were made for
(1) Drosphila and humans
(2) Drosophila and Pisum sativum
(3) Drosophila and Maize
(4) Humans and maize

04. Sex pie balds are
(1) Haploids
(2) Gynanders
(3) Free martins
(4) Nutritional mutants

05. When two alleles coming from different parents tend to enter different gametes to remain apart in offspring, it is
(1) Non-disjunction
(2) Criss cross inheritance
(3) Repulsion
(4) Diagynic inheritance

06. Sex determination in moths and butterflies is
(1) ZO–ZZ
(2) XX–XY
(3) ZW–ZZ
(4) XX–XO

07. The chromosomes bearing loops for rapid transcription and informosomes production are
(1) Lampbrush chromosomes
(2) Polytene chromosomes
(3) SAT chromosomes
(4) B chromosomes

08. Individuals showing presence of one barr body in nucleus of somatic cells
(1) Normal female (2) Normal male
(3) Turner’s syndrome (4) Both (1) and (4)

09. Differential staining of chromatin is termed as
(1) Constitutive banding
(2) Heteropycnosis
(3) Chromomeric staining
(4) Interkinesis

10. Non-separation of synapsed homologous
chromosomes is
(1) Mitotic non-disjunction
(2) Meiotic non-disjunction
(3) Repulsion
(4) Heteropycnosis

11. Wheat plant is 6n = 42. What will be the number of chromosomes in it’s Monosomic, haploid and Trisomics?
(1) 41, 21 and 7
(2) 43, 21 and 7
(3) 15, 7 and 7
(4) 13, 7 and 15

12. If there is complete linkage in F2
generation
(1) Parental types and recombinants appear in equal ratio
(2) Recombinants are less than parental types
(3) Recombinants are more than parental types
(4) There will be only parental types

13. X-rays cause mutation by
(1) Transition
(2) Transversion
(3) Deletion
(4) Base substitution

14. Crossing over results in
(1) Recombination between linked genes
(2) Linkages between genes
(3) Segregation of genes
(4) Dominance of genes

15. In Melandrium, sex determination is of
(1) XX–XO (2) ZZ–ZW
(3) XX–XY (4) XY–XO

16. Mustard gas was used as a chemical mutagen for
the first time by
(1) Muller
(2) Alterberg
(3) Auerbach and Robinson
(4) Stadler

17. A chromosome with sub-terminal centromere is
(1) Acentric
(2) Acrocentric
(3) Metacentric
(4) Telocentric

18. Which of the following is first Man Made Plant?
(1) Triticale
(2) Raphanobrassica
(3) Upland cotton
(4) Brassica juncea

19. Higest number of chromosomes in plants have been recorded in
(1) Marsilia
(2) Aulosira
(3) Ophioglossum
(4) Parthenium