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12th West Bengal Board
IMPORTANT
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Important Questions on Heredity and Variation

EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 50
Point mutation involves 
HARD
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 51
Sickle cell anaemia is
EASY
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 52
Down syndrome is due to
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 53
 A character which is expressed in hybrid is called
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 54
Which of the following is correct? 
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 55
In seven pairs of contrasting characters in pea plant studied by Mendel, the number of flower-based character was
HARD
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 56
Phenylketonuria is an autosomal recessive disorder located on chromosome
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 57
In Mendel's experiment how many different kinds of seeds are produced from a short plant with wrinkled seeds (ttrr)?