Explain female heterogamety with the help of an example.

Important Questions on Principles of Inheritance and Variations

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 7

Explain the process of artificial hybridisation to get improved crop variety in plants bearing bisexual flowers.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 8

Explain the mechanism of sex determination in insects like Drosophila and Grasshopper.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 11

Write the genotype of both the parents who have produced sickle-celled anaemic offspring.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 12

A plant with purple flowers was crossed with white flowers producing 50 plants with only purple flowers. On selfing these plants produced 482 plants with purple flowers and 162 plants with white flowers. What gametic mechanism accounts for these results? Explain.

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 13

What is the phenotype of I^Ai , whether it is blood group A, B, AB or O? (Mention only A, B, AB or O)

MEDIUM

12th CBSE

IMPORTANT

TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 13

What is the phenotype of ii ? (Blood group A/ Blood group AB / Blood group O)

HARD

12th CBSE