MEDIUM
12th CBSE
IMPORTANT
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Write the type of sex determination mechanism of the following cross. Give an example of this type.

Female ZW and male ZZ.

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 16
A cross was carried out between two pea plants showing the contrasting traits of the height of the plant. The result of the cross showed 50% off parental characters.
Work out the cross with the help of Punnett square.
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 16
A cross was carried out between two pea plants showing the contrasting traits for the height of the plant. The result of the cross showed 50% of parental characters. Name the type of cross that is carried out.
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 17
With the help of one example explain the phenomenon of codominance and multiple allelism in human population.
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 18
Write the Scientific name of the fruit fly. Why did Morgan prefer to work with fruit flies for his experiments? State any three reasons.
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 19
Linkage and crossing over of genes are alternatives of each other. Justify with the help of an example.
 
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 20
In Snapdragon, a cross between true-breeding red-flowered (RR) plants and true-breeding white-flowered (rr) plants showed a progeny of plants with all pink flowers.
The appearance of pink flowers is not known as blending. Why?
 
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 20
In Snapdragon, a cross between true-breeding red-flowered (RR) plants and true-breeding white-flowered (rr) plants showed a progeny of plants with all pink flowers,
What is this phenomenon known as?
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 21
Differentiate between male and female heterogamety?