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Biology : 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.

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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.

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84. Self-fertilising trihybrid plants form :

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

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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

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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

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87. Female heterogamy is found in :

Birds
humans
Both (A) & (B)
Drosophila

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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

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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

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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?

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