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IMPORTANT
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A cross in which parents differ in a single pair of contrasting character is called

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Important Questions on Principles of Inheritance and Variation

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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 7
The proportion of plants that were dwarf and tall in F2- generation of Mendel's experiment was
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 8
Mendel performed test cross to know the
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 9
Find out the genotype and phenotype of F1— Generation (R= dominant and red, r =recessive and white) from the given cross in plant snapdragon showing incomplete dominance.
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 10
Incomplete dominance is different from complete dominance in having similar
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 11
The ABO blood groups are controlled by
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 12

The plasma membrane of the red blood cells has... A.... polymers that protrude from its surface and the kind of sugar is controlled by the gene. The gene I have three alleles .......B........IA And IB Produce a slightly different form of the sugars, while allele I do not produce any ....C.......

Choose the correct option for A, B and C.

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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 13
Who argued that pairing and separation of chromosomes would lead to the segregation of a pair of factors they carried?
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12th ICSE
IMPORTANT
ISC Biology Class XII>Chapter 5 - Principles of Inheritance and Variation>Chapter Practice>Q 14
Linked genes present on