Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Principles of Inheritance and Variation

Multiple Choice Questions

81. If a cross between two plants give 50% tall and 50% dwarf progeny, then the parents genotype are :

Tt x Tt
Tt x tt
TT x tt
TT x Tt.

122 Views

82. How many different types of gametes can be formed by F₁ progeny, resulting from the cross AABBCC x aabbcc ?

83. A person with blood group A has :

Antigen A and antibody B
Antigen B and antibody A
Antigen A and antibody A
No antibody and no antigen.

115 Views

84. Self-fertilising trihybrid plants form :

Eight different gametes
Four different gametes
Thirty two different gametes
Sixty four different gametes

132 Views

85. In order to find out the genotype of a dominant individual, it should be crossed to a plant with :

dominant genotype
heterozygous genotype
recessive genotype
same genotype

137 Views

86. What will be the genotypic ratio for the Monohybrid Test cross between a heterozygous dominant with a recessive parent?

03:01
01:01
01:02:01
1:1:1:1

121 Views

87. Female heterogamy is found in :

Birds
humans
Both (A) & (B)
Drosophila

267 Views

88. In which process there is a gain of segment of DNA which result in alternation in chromosome number.

Insertion
Duplication
Both (A) and (B)
Deletion

117 Views

89. A child has blood group O. If the mother has blood group B then what are the possibilities of blood group of father ?

A
B
O
All of the above

244 Views

Long Answer Type

90.
Two heterozygous parents are crossed. If the two loci are linked what would be the distribution of phenotypic features in F₁ generation for a dibybrid cross?

If the two loci are linked then they are inherited together and no crossing over between them takes place. Thus if we take an example of a cross between yellow body and white eyes and wild type parent in a Drosophila will produce wild type and yellow white progenies. It is because yellow bodied and white eyed genes are linked. Therefore, they are inherited together in progenies. Due to linkage the percentage of the parental type is 98.7% while those of recombinants is 1.3%.