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The number is linkage group(s) present in Escherichia coli is

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Important Questions on Heredity and Variation

MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 81
Which one of the following conditions correctly describes the manner of determining the sex?
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 82
When two unrelated individuals or lines are crossed, the performance of the F1 hybrid is often superior to both its parents. This phenomenon is called 
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 83
Mutations can be induced with 
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 84
A person with an unknown blood group under the ABO system has suffered much blood loss in an accident and needs an immediate blood transfusion. His friend who has a valid certificate of his own blood type offers blood donation without delay. What would have been the type of blood group of the donor friend?
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12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 85
A test cross in plants or in Drosophila involves crossing
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 86
Which one of the following conditions of the zygote would lead to the birth of a normal human female child?
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12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 88
A normal-visioned man whose father was colour-blind marries a woman whose father was also colour-blind. They have their first child as a daughter. What is the chance that this child would be colour-blind?
MEDIUM
12th West Bengal Board
IMPORTANT
A TEXT BOOK OF BIOLOGY CLASS 12>Chapter 5 - Heredity and Variation>EXERCISE>Q 90

Represented below is the inheritance pattern of a certain type of trait in humans. Which one of the following conditions could be an example of this pattern?

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