MEDIUM
12th CBSE
IMPORTANT
Earn 100

Haemophilia is a sex-linked recessive disorder of humans. The pedigree chart given below shows the inheritance of haemophilia in one family. Study the pattern of inheritance and answer the questions given.

Question Image
Give all the possible genotypes of the members 4, 5 and 6 in the pedigree chart.
 

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 1

Haemophilia is a sex-linked recessive disorder of humans. The pedigree chart given below shows the inheritance of haemophilia in one family. Study the pattern of inheritance and answer the questions given.

Question Image
A blood test shows that the individual 14 is carrier of haemophilia. The member numbered 5 has recently married the member numbered 14. What is the probability that their first child will be a haemophilic male?

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 2
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 CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 5 - Principles of Inheritance and Variations>TEST QUESTIONS>Q 3
Recently a girl baby has been reported to suffer from Haemophilia. How is it possible. Explain with the help of a cross.
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 4
In one family, each of four the children has a different blood group. Explain with the help of cross.
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 5
Who proposed chromosomal theory of inheritance ? Point out any two similarities in the behaviour of chromosomal and genes
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 6
Why are grasshopper and Drosophila said to show male heterogamety? 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 6
Explain female heterogamety 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 7
Explain the process of artificial hybridisation to get improved crop variety in plants bearing bisexual flowers.