Question

If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease?

100%

50%

0%

75%

Solution

50%

Haemophilia is a X-linked recessive disorder. The presence of single X-chromosome (with haemophilia gene) show the disease in male. Therefore, in the above example, boy chances of inheriting the disease is 50%.

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

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Principles Of Inheritance And Variation

If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease?

100%

50%

0%

75%

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

Write down Mendel’s dihybrid Phenotypic ratio

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

What is the unique feature of F1 generation ?

What will be the genetic make up of an organism which suffers from sickle cell anaemia ?

What do the symbols square and circle in a pedigree chart indicate ?

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NCERT Sample Papers

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For Daily Free Study Material Join wiredfaculty

Principles Of Inheritance And Variation

If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease? 100% 50% 0% 75%

Some More Questions From Principles of Inheritance and Variation Chapter

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

Write down Mendel’s dihybrid Phenotypic ratio

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

What is the unique feature of F1 generation ?

What will be the genetic make up of an organism which suffers from sickle cell anaemia ?

What do the symbols square and circle in a pedigree chart indicate ?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

If a boy's father has haemophilia and his mother has one gene for haemophilia, what is the chance that the boy will inherit the disease?

100%

50%

0%

75%