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

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12th West Bengal Board
IMPORTANT
Which of the following conditions is called monosomies
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12th West Bengal Board
IMPORTANT

The phenotypic ratio in plant Snapdragon in F2 is

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12th West Bengal Board
IMPORTANT
A pea plant parent having violet colour flowers with unknown genotype was crossed with a plant having white colour flowers, in the progeny 50% flowers were violet and 50% were white. The genotypic constitution of the parent having violet colour flower was
MEDIUM
12th West Bengal Board
IMPORTANT
The number is linkage group(s) present in Escherichia coli is
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12th West Bengal Board
IMPORTANT
Which one of the following conditions correctly describes the manner of determining the sex?
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12th West Bengal Board
IMPORTANT
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 
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12th West Bengal Board
IMPORTANT
Mutations can be induced with 
MEDIUM
12th West Bengal Board
IMPORTANT
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?