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?
(a)GGG
(b)AAG
(c)GAA
(d)GUG

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Important Questions on Principles of Inheritance and Variation
EASY
12th CBSE
IMPORTANT
Person having genotype IA IB would show the blood group as AB. This is because of

MEDIUM
12th CBSE
IMPORTANT
ZZ/ZW type of sex determination is seen in

EASY
12th CBSE
IMPORTANT
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
In a dihybrid cross, if you get ratio it denotes that

MEDIUM
12th CBSE
IMPORTANT
Which of the following will not result in variations among siblings?

MEDIUM
12th CBSE
IMPORTANT
What will never be father's blood group if the mother has blood group B and child blood group O?

MEDIUM
12th CBSE
IMPORTANT
Mendel’s Law of independent assortment holds good for genes situated on the

EASY
12th CBSE
IMPORTANT
Occasionally, a single gene may express more than one effect. The phenomenon is called
