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12th Meghalaya Board
IMPORTANT
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 Down’s syndrome occurs as a result of

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Important Questions on Principles of Inheritance and Variation

EASY
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 5

How many trisomies are possible in humans?

MEDIUM
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 6
The inheritance pattern of ABO blood groups in humans shows dominance, co-dominance and multiple allelism. Explain each concept with the help of blood group genotypes.
MEDIUM
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 7
Mendel published his work on the inheritance of characters in 1865, but it remained unrecognised till 1900. Give three reasons for the delay in accepting his work.
MEDIUM
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 8
Differentiate between dominance and codominance.
HARD
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 9
How are Mendelian inheritance, polygenic inheritance, and pleiotropy different from each other?
EASY
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 10
What are 'true-breeding lines' that are used to study the inheritance pattern of traits in plants?
EASY
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 11
Name the type of cross that would help to find the genotype of a pea plant bearing violet flowers.
MEDIUM
12th Meghalaya Board
IMPORTANT
Biology Crash Course (Based on Revised Syllabus-2023)>Chapter 5 - Principles of Inheritance and Variation>Exercise>Q 12
How does a test cross help in identifying the genotype of the organism? Explain.