Q.1
Gametes of AaBb individual can be ... ... [ AIIMS 1991 ]
  • a) Aa, Bb
  • b) AB, ab
  • c) AB, ab, aB
  • d) AB, Ab, aB aa
Q.2
Which one is not a dominant trait amongst seven pea plants chosen by Mendel... ... [Maipal 2000 ]
  • a) Flower colour - purple
  • b) Pod colour - yellow
  • c) Shape of seed - Round
  • d) Flower - Axial
Q.3
Ratio 1:1:1:1 is obtained from a cross of ... .. [ kerala 2003 ]
  • a) RRYY × rryy
  • b) RRYy × rrYy
  • c) RrYY × Rryy
  • d) RrYy × rryy
Q.4
When yellow round heterozygous Pea plants are self fertilized, the frequency of occurrence of RrYY genotype among the offspring is ... ... [ kerala 2012 ]
  • a) 9/16
  • b) 3/16
  • c) 2/16
  • d) 6/16
Q.5
Which of the following match is correct
  • a) independent assortment - Segregation of factors
  • b) Lamarck - Natural selection
  • c) Hatch and Slack -Chemiosmotic theory
  • d) Peter Mitchell - Proposed Z-scheme
Q.6
Hemoglobins of normal and sickle cell patient are subjected to electrophoresis. They will show ... ... [ AMU 2012 ]
  • a) Same mobility
  • b) Different mobility
  • c) No mobility
  • d) Haemoglobin of patient does not move
Q.7
Which one is correct? ... .. [ Odisha 2002 ]
  • a) Polygenic character is controlled by multiple genes
  • b) Numerous intermediate types are found in between the two extremes in polygenic inheritance
  • c) Height, weight and skin colour are polygenic
  • d) Polygenic trait is controlled by multiple alleles
Q.8
In albinism, the absence of which pigment makes the skin and hair light coloured ... ..[ EAMCET 1999 ]
  • a) Melanin
  • b) Carotene
  • c) haemoglobin
  • d) Chlorophyll
Q.9
A pleiotropic gene is ... ...
  • a) IA
  • b) HbS
  • c) HbA
  • d) IB
Q.10
Heterosis is ... .. [ CPMT 1997 ]
  • a) Hybrid weakness
  • b) Hybrid weakness and vigour
  • c) Hybrid vigour
  • d) Neither weakness nor vigour of hybrid
Q.11
The process of removing stamens from floral buds during hybridization experiments is .... .. [ MPPMT 1993 ]
  • a) Capping
  • b) Selfing
  • c) Emasculation
  • d) Crossing
Q.12
An individual having different alleles of a gene is ... ... [ Odisha 200 8]
  • a) heterozygous
  • b) Homozygous
  • c) Diploid
  • d) Mosaic
Q.13
RR ( Red) Antirrhinum is crossed with white (WWW) one. Offspring RW are pink. This is an example of ... ... [ CBSE 1991 ]
  • a) Dominant - recessive
  • b) Incomplete dominance
  • c) Hybrid
  • d) Supplementary gene
Q.14
Multiple alleles control inheritance of ... .. [ AMU 2003 ]
  • a) Colour blindness
  • b) Sickle cell anaemia
  • c) Blood groups
  • d) Phenylketonuria
Q.15
Cross between homozygous black rough ( BBRR) guinea pig and homozygous white smooth guinea pig ( bbrr) produced black and rough animals in F1 generation. presuming the genes to be present on different chromosomes, the percentage of F2 individuals which are heterozygous for both the gene pairs would be ... ... [ Manipur 2005 ]
  • a) 25%
  • b) 35%
  • c) 50%
  • d) 75%
Q.16
grain colour of wheat is determined by three pairs of polygenes. A cross was made between AABBCC (coloured) and aabbcc (light). In F2 generation what percent of progeny would resemble parents. ... ... [ AIIMS 2008 ]
  • a) Half
  • b) Three fourth
  • c) One third
  • d) Less than 5%
Q.17
A child with mother of A group and father of AB group, will not have the following blood group. .... .. [ CPMT 2005 ]
  • a) A
  • b) B
  • c) AB
  • d) O
Q.18
How many contrasting traits of Pea pod were chosen by Mendel? ... ... [ AMU 1998 ]
  • a) 7
  • b) 2
  • c) 4
  • d) 3
Q.19
Emasculation is related to ... .. [ JIPMER 2002 ]
  • a) Pure line
  • b) mass selection
  • c) Clonal selection
  • d) Hybridization
Q.20
If Mendel had studied 7 traits using a plant with 12 chromosomes instead of 14, he would have ... .. [ CBSE 1998 ]
  • a) Discovered the law of independent
  • b) Not discovered the law of independent assortment
  • c) Maped the chromosome
  • d) Amitosis
Q.21
A person with blood group A possesses ... .. [ AFMC 2004 ]
  • a) Antigen A and antibody B
  • b) Antigen B and antibody a
  • c) Antigen A and antibody b
  • d) No antigen and no antibody
Q.22
A dihybrid condition is ... .. [ CBSE 1991 ]
  • a) tt Rr
  • b) Tt rr
  • c) tt rr
  • d) Tt Rr
Q.23
Polygenes show ... .. [ CBSE 1996 ]
  • a) Different phenotypes
  • b) Different genotypes
  • c) Both of the above
  • d) None of the above
Q.24
Out of a population of 800 individuals in F2 generation of cross between yellow round and green wrinkled Pea plants, what would be number of yellow and wrinkled seeds .... .. [ Manipal 2002 ]
  • a) 800
  • b) 400
  • c) 200
  • d) 150
Q.25
Four daughter cells obtained from a single meiosis differ from one another because of .... ... [ BHU 1994 ]
  • a) Crossing over
  • b) Independent assortment
  • c) Change in chromosome number
  • d) Both A and B
Q.26
ABO blood grouping is determined by three alleles. Possible genotypes and phenotypes are .... .. [ kerala 2012 ]
  • a) 3, 1
  • b) 6, 4
  • c) 4, 6
  • d) 9, 7
Q.27
Which is correct about traits chosen by Mendel ... .. [ AFMC 2007 ]
  • a) Terminal pod is dominant
  • b) Constricted pod is dominant
  • c) Green coloured pod is dominant
  • d) Tall plants are recessive
Q.28
F2 generation is produced by ... ... [ CPMT 1993]
  • a) Crossing F1 progeny with one of the parents
  • b) Selfing the progeny of two identical parents
  • c) Selfing the parents
  • d) Recessive cross between individual parents
Q.29
The allele which is unable to express its effect in the presence of another is called ... ... [ CBSE 1991 ]
  • a) 8
  • b) 4
  • c) 2
  • d) 16
Q.30
Independent assortment is absent in case of ... .. [ CBSE 2001 ]
  • a) Genes located on the same chromosome
  • b) Genes located on homologous chromosomes
  • c) Genes located on non-homologous chromosomes
  • d) All the above
Q.31
Test cross ratio of 1:1:1:1 proves that ... .. [ Odisha 2011]
  • a) F1 hybrid produces four different gametes
  • b) F1 hybride is homozygous
  • c) Two different progenies are produced by P1 parent
  • d) Non of the above
Q.32
Genotype F1 individuals can be tested by ... .. [ EAMCET 1996 ]
  • a) Backcross with homozygous recessive parent
  • b) Reciprocal crossing
  • c) Backcrossing with heterozygous parent
  • d) Backcrossing with homozygous dominants
Q.33
B blood group person can donate blood to and receive blood from ... .. [ DPMT 2005 ]
  • a) B, O and B,O
  • b) B, AB and B, AB
  • c) B, AB and B,O
  • d) AB and A,B
Q.34
Which of the following genotype does not produce any sugar polymer on the surface of RBCs .. .. [ kerala 2010]
  • a) IAIA
  • b) IB i
  • c) IAIB
  • d) ii
Q.35
F2 ratio is chicken came out to be 9 rose comb blacks, 1 single comb black, 3 rose comb white and 3 single comb black. Which are the recessives? [ EAMCET 1996 ]
  • a) Single comb, white plumage
  • b) Rose comb, white plumage
  • c) Single comb, black plumage
  • d) Rose comb, black plumage
Q.36
Phenotypic dihybrid ratio is ... .. [ AFMC 2000 ]
  • a) 9:3:3:1
  • b) 15:1
  • c) 9:6:1
  • d) 1:2:1
Q.37
Organisms phenotypically similar but genetically different are ... ..[ EAMCET 1999]
  • a) Heterozygous
  • b) Homozygous
  • c) Monozygous
  • d) Multizygous
Q.38
A cross between hybrid and its parent is ... ... [ MPPMT 1998 ]
  • a) Back cross
  • b) Reciprocal cross
  • c) Monohybrid cross
  • d) Dihybrid cross
Q.39
A cross AaBb and aabb yields ... .. [ Pb PMT 1997 ]
  • a) AaBb and aabb
  • b) AaBb, Aabb, aaBb and aabb
  • c) Aabb
  • d) Aabb
Q.40
Match the genetic phenomena with their respective ratios
(a) Inhibitory gene ratio (1) 9:3:4
(b) Complementary gene ratio (2) 1:1:1:1
(c) Recessive epistasis ratio (3) 12:3:1
(d) Dihybrid test cross ratio (4) 13:3
(e) Dominant epistasis ratio (5) 9:7
  • a) a - 5, b - 4, c - 3, d - 2, e - 1
  • b) a - 4, b - 5, c - 1, d - 2, e - 3
  • c) a - 1, b - 2, c - 4, d - 3, e - 5
  • d) a - 5, b - 4, c - 1, d - 2, e - 3
Q.41
Validity of Mendel's law of segregation is established when ... .. [ MPPMT 2004]
  • a) Two hybrids are crossed
  • b) A parent is crossed with F1 hybrid
  • c) Two pure breeding contrasting traits are crossed
  • d) None of the above
Q.42
A man of A - blood group marries a woman of AB blood group. Which type of progeny would indicate that man is heterozygous A? ... . [ CBSE 1993 ]
  • a) AB
  • b) A
  • c) O
  • d) B
Q.43
Offspring produced from a marriage have only O and A blood groups. The possible genotypes of the parents would be ... .. [ KCET 2009]
  • a) IAIA and IAIB
  • b) IAIA and IOIO
  • c) IOIO and IOIO
  • d) IAIO and IOIO
Q.44
Blood grouping in human beings is controlled by .... [ DPMT 1996 ]
  • a) 4 alleles in which A is dominant
  • b) 3 alleles in which A and B are codominant and i is recessive
  • c) 3 alleles in which none is dominant
  • d) 3 alleles in which A is dominant
Q.45
Correct reason for Mendel's success was ... .. [ BHU 2001 ]
  • a) He repeated each experiment several times
  • b) traits chosen by him had genes far apart so that linkage was absent
  • c) He kept record of all experiments
  • d) He used statistical techniques
Q.46
Tall read flowered Pea plant crossed to dwarf white flowered plant yields only tall red flowered plants. A test cross shall give a ratio of ... .... [ AMU 1998 ]
  • a) 1 : 1
  • b) 3 : 1
  • c) 1 : 1 : 1 :
  • d) 1 : 2 : 4 : 6 : 4 : 2 : 1
Q.47
Mendel chose contrasting traits in Pea ... .. [ WB 2011 ]
  • a) Three
  • b) Two
  • c) One
  • d) Seven
Q.48
Red seed colour shows an F2 ratio of 1:4:6:4:it is due to ... .. [ DPMT. 1996 ]
  • a) Two polygenes
  • b) Different number of dominant genes
  • c) Different number of recessive genes
  • d) Supplementary genes
Q.49
Phenotypic and genotypic ratio in F2 generation in incomplete dominance is ... .. [ AMU 2003 ]
  • a) 1:2:1 and 1:2:1
  • b) 3:1 and 1:2:1
  • c) 9:6 and 3:1
  • d) 9:3:3:1 and 1:2:1:4:1:1:2:1:2:1
Q.50
Gene P and Q are both required in dominant state for normal hearing. A deaf couple has all children with normal hearing. The probable genotype for the couple is ... ...
  • a) PPqq × ppQQ
  • b) PPqq × PPqq
  • c) PpQq × ppqq
  • d) PPqq × ppQq
0 h : 0 m : 1 s