In a dihybrid cross, if you get $9:3:3:1$ ratio it denotes that

Important Questions on Principles of Inheritance and Variation

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 11

Which of the following will not result in variations among siblings?

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 12

What will never be father's blood group if the mother has blood group B and child blood group O?

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 13

Mendel’s Law of independent assortment holds good for genes situated on the

EASY

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 14

Occasionally, a single gene may express more than one effect. The phenomenon is called

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 15

In a certain taxon of insects, some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome bearing organisms are

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 16

The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to

MEDIUM

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 17

It is said that Mendel proposed that the factor controlling any character is discrete and independent. His proposition was based on the

EASY

12th CBSE

IMPORTANT

Xam Idea Biology>Chapter 5 - Principles of Inheritance and Variation>Multiple Choice Questions [1 mark]>Q 18

Which of the following represents a pair of contrasting characters?