MEDIUM
12th CBSE
IMPORTANT
Earn 100

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 7
Explain the process of artificial hybridisation to get improved crop variety in female parent producing unisexual 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.
HARD
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 9
During his studies on genes in drosophila that were sex-linked, T.H. Morgan found F2 population phenotypic ratios deviated from expected 9:3:3:1, Explain the conclusion he arrived at.
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 10
How are dominance, co-dominance and incomplete dominance pattern of inheritance different from each other?
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
Sickle-Cell anaemia in humans is a result of point mutation. 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 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.