EASY
12th CBSE
IMPORTANT
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In sickle cell anaemia, glutamic acid is replaced by valine. Which one of the following triplets codes for valine?

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Important Questions on Principles of Inheritance and Variation

EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 7
Person having genotype IA IB would show the blood group as AB. This is because of
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 8
ZZ/ZW type of sex determination is seen in
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 9
A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 10
In a dihybrid cross, if you get 9:3:3:1 ratio it denotes that
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 11
Which of the following will not result in variations among siblings?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 12
What will never be father's blood group if the mother has blood group B and child blood group O?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 13
Mendel’s Law of independent assortment holds good for genes situated on the
EASY
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 14
Occasionally, a single gene may express more than one effect. The phenomenon is called