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History, Monohybrid Cross, Dihybrid Cross, Back

1.    Germplasm concept was proposed by

[RPMT-2009]

(1) Mendel                                    (2) De-vries
(3) Aristoltle                      (4) Weismann

2.    The genetic information is carried by

[RPMT-93, 94]

 (1) Chromosome              (2) Nucleic acid
 (3) Gamete / Cells            (4) Cytoplasm

3.    On which plant mende0l had carried out his
investigations

[RPMT-87, 88]          

(1) Garden – pea               (2) Wild pea
(3) Cow-pea                      (4) Pigeon pea

4.    Which of the following is non -heritable

[AIPMT2010]

(1) Point mutation

(2) Chromosomal mutation

(3) Gene mutation

(4) Somatic mutation

5.    The year 1900 AD is highly significant for geneticistsdue to the

[RPMT-2009]

(1) Discovery of genes

(2) Principle of Linkage

(3) Mendelian rediscovery

(4) Chromosome theory of heredity

6.    During breeding the removal of anthers from a
flower is called

[MP PMT-2011]        

(1) Anthesis                      (2) Pollination
(3) Emasculation               (4) Vasectomy

7.    When a heterozygous tall pea plant of Fj generation upon self fertilization produces tall and dwarf phenotypes it proves the principle of

[RPMT-85, 90]

(1) Dominance

(2) Segregation

(3) Independant assortement

(4) Inheritance & purity of gametes

8.    Mendel formulated the law of purity of gametes onthe basis of

[RPMT 2009] 

(1) Dihybrid cross

(2) Monohybrid cross

(3) Back cross

(4) Test cross

9.    Mendelian monohybrid ratio is

[RPMT-2008]

(1)1:2:1                             (2)3:1
(3)9:3:1                             (4)9:3:4

10.  In a monohybrid cross the genotypic ratio of the offspring is      

[MP PMT-2007]

(1)3:1                    (2)1:2:1
(3)1:1:1:1                          (4)4:0

11.  A cross between AaBB X aa BB yields a genotypicratio of

[AIPMT-90]   

(1) 1 AaBB: 1 aaBB

(2) 1 AaBB : 3 aaBB

(3) SAaBB : 1 aa BB

(4)AllAaBb

12.  In monohybrid cross what is the ratio of homozygous dominant and homozygous recessive individuals in F2-generation

[RPMT-89-92-93-96] 

(1)1:2:1                 (2)2:1/1:2
(3)3:1/1:3                          (4)1:1

13.  Back cross is a cross between [RPMT-2008]      

(1) F₁ x F₁             (2) F₁ xRecessive
(3) F₁ x Dominant   (4) F₁ x any parent

14.  The cross between recessive to it's hybrid or it's Fjplant is called [RPMT-92, 93, 96]     

(1) Back cross           (2) Test cross
(3) Monohybrid cross  (4) Dihybrid cross

15.  What is the genotypic and phenotypic ratio of monohybrid test cross

[RPMT2009]  

(1)1:1                                (2)1:2
(3)3:                                  (4)1:2:1

16.         What is the ratio of a progeny of cross between Fjheterozygous and recessive :-

(1)3:1                                (2)1:2:1
(3)1:1                                (4)2:1

17.         Dihybrid cross proves the law of :-

(1) Segregation                 

(2) Purity of gametes

(3) Dominance                 

(4) Independent assortment

18.         How many types & in what ratio the gametes are produced by a dihybrid heterozygous :-

(1) 4 types in the ratio of  9:3:3:1       

(2) 2 types in the ratio of  3:1

(3) 3 types in the ratio of  1:2:1

(4) 4 types in the ratio of  1:1:1:1

19.         How many gametes are produced in F: generationof a trihybrid :-           

(1) 3                                  (2) 4
(3) 8                                  (4) 16

20.         Which genotype represents a true dihybrid condition
(1) tt rr                              (2) Tt rr
(3) Tt Rr                            (4) TT Rr

21.         Mendel enunciated how many principles of
inheritance :-        

(l) One                              (2) Two
(3) Three                           (4) Four

22.         Mendelian ratio 9:3:3:1 is due to

(1) Law of segregation

(2) Law of purity of gametes

(3) Law of independent assortment

(4) Law of unit characters

23.         n a cross between a pure tall plant with green pod& a pure short plant with yellow pod. How manyshort plants are produced in F2 generation out of16 :-      

(1) 1                                  (2) 3
(3) 4                                  (4) 9

24.         In a dihybrid cross between AABB and aabb theratio of AABB, AABb, aaBb, aabb in F2generationis :-           

(1)9:3:3:1              (2)1:1:1:1
(3)1:2:2:1                (4)1:1:2:2

25.       Branch of biology dealing with heredity and variationis called :- 
(1) Palaentolozy      (2) Evolution
(3) Genetics             (4) Ecolozy

26.       A dihybrid ratio is :-

(1)1:1:1:1              (2)3:1

(3)9:3:3:1                          (4) 9:5:1:1

 27.      AABbCc genotype forms how many types ofgametes :-  

(1) 4                      (2) 8
(3) 2                      (4) 6

28.       Who rediscovered the results of mendel's
experiments :-      

(1) Devries, Tschemark, correns

(2) Devries, Tschemark, Morgan

(3) Tschemark, Morgan, correns

(4) Tschemark, Bateson, Punnet,

29.       Crossing AABB & aabb, the ratio of AaBb would be in F2 generation :- 

(1)1/16                  (2)2/16
(3) 8/16                (4) 4/16

30.       On crossing red & white flowered plants the ratioof red and white flowered plants in F2-gen.was60:20, then on selfing the heterozygous redflowered plants, the offsprings would be :-

(1) 72:24               (2) 40:60  

(3) 52:48               (4) 84:16